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The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"By William S. 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Boyd Gaming Properties Trust  (\"WSBGPT\") to the education trusts of the following grandchildren in the amounts specified in brackets: The William Samuel Boyd 1997 Education Trust Dated 7/1/97 (182 shares),; The Josef William Boyd 1997 Education Trust Dated  7/1/97 (182 shares); The Justin Boyd 1999 Education Trust Dated 11/1/99 (182 shares); and Sean William Johnson 1997 Education Trust Dated 7/1/97 (182 shares)."}],"balance_after":14543199,"source":{"system":"sec-edgar","filing":"0001062993-23-000839","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299323000839/form4.xml","form_type":"4"}},{"id":2085648,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Executive Chair"}}],"security":"Common Stock","published_at":"2022-12-15T21:43:27.000Z","date":"2022-12-14","kind":"sale","acquired":false,"shares":190000,"price":58.8995,"value":11190905.0,"ownership":{"direct":false,"nature":"BY Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $58.185 to 59.70. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was affected."}],"balance_after":14543927,"source":{"system":"sec-edgar","filing":"0001062993-22-023955","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299322023955/form4.xml","form_type":"4"}},{"id":2086959,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Executive Chair"}}],"security":"Common Stock","published_at":"2022-12-14T23:44:11.000Z","date":"2022-12-12","kind":"sale","acquired":false,"shares":106562,"price":58.6101,"value":6245609.4762,"ownership":{"direct":false,"nature":"BY Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $58.12 to 59.01. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was affected."}],"balance_after":14733927,"source":{"system":"sec-edgar","filing":"0001062993-22-023907","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299322023907/form4.xml","form_type":"4"}},{"id":2093842,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Executive Chair"}}],"security":"Common Stock","published_at":"2022-12-08T00:38:03.000Z","date":"2022-12-05","kind":"tax_withholding","acquired":false,"shares":7673,"price":58.91,"value":452016.43,"ownership":{"direct":false,"nature":"BY Trust"},"balance_after":14840489,"source":{"system":"sec-edgar","filing":"0001062993-22-023519","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299322023519/form4.xml","form_type":"4"}},{"id":2138594,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Executive Chair"}}],"security":"Common Stock","published_at":"2022-10-12T20:23:06.000Z","date":"2022-09-29","kind":"gift","acquired":false,"shares":135000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On September 29, 2022, the Reporting Person gifted 135,000 shares of common stock from the William S. Boyd Gaming Properties Trust (\"WSBGPT\") to The Boyd Foundation."}],"balance_after":14848162,"source":{"system":"sec-edgar","filing":"0001062993-22-020732","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299322020732/form4.xml","form_type":"4"}},{"id":2362613,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Executive Chair"}}],"security":"Common Stock","published_at":"2022-03-02T21:45:45.000Z","date":"2022-02-28","kind":"grant","acquired":true,"shares":49357,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares underlying Performance Share Units that vested on February 28, 2022."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19399162,"source":{"system":"sec-edgar","filing":"0001062993-22-006351","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299322006351/form4.xml","form_type":"4"}},{"id":2379959,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Executive Chair"}}],"security":"Common Stock","published_at":"2022-02-23T23:46:45.000Z","date":"2022-02-18","kind":"grant","acquired":true,"shares":11559,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The Reporting Person was awarded 11,559 Restricted Stock Units for no consideration pursuant to the Issuer's 2020 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full on December 16, 2024.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2020 Stock Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Reporting Person was awarded 11,559 Restricted Stock Units for no consideration pursuant to the Issuer's 2020 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full on December 16, 2024.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2020 Stock Incentive Plan."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19349805,"source":{"system":"sec-edgar","filing":"0001062993-22-005430","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299322005430/form4.xml","form_type":"4"}},{"id":2429169,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Executive Chair"}}],"security":"Common Stock","published_at":"2022-01-21T21:56:18.000Z","date":"2022-01-18","kind":"gift","acquired":false,"shares":33500,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 18, 2022, the reporting person gifted 33,500 shares of Common Stock from the William S. Boyd Gaming Properties Trust to Judy Boyd, Trustee of the Judy Boyd Living Trust dated March 16, 2017."}],"balance_after":19338246,"source":{"system":"sec-edgar","filing":"0001062993-22-001390","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299322001390/form4.xml","form_type":"4"}},{"id":2435313,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Executive Chair"}}],"security":"Common Stock","published_at":"2022-01-14T21:33:17.000Z","date":"2022-01-12","kind":"gift","acquired":false,"shares":624,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 12, 2022, the reporting person gifted 624 shares of Common Stock (the \"Shares\") from William S. Boyd Gaming Properties Trust  (\"WSBGPT\") to the education trusts of the following grandchildren in the amounts specified in brackets: The William Samuel Boyd 1997 Education Trust Dated 7/1/97 (156 shares),; The Josef William Boyd 1997 Education Trust Dated  7/1/97 (156 shares); The Justin Boyd 1999 Education Trust Dated 11/1/99 (156 shares); and Sean William Johnson 1997 Education Trust Dated 7/1/97 (156 shares)."}],"balance_after":19371746,"source":{"system":"sec-edgar","filing":"0001062993-22-001076","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299322001076/form4.xml","form_type":"4"}},{"id":2445678,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Executive Chair"}}],"security":"Career Restricted Stock Units","published_at":"2022-01-06T00:11:05.000Z","date":"2022-01-03","kind":"grant","acquired":true,"shares":2460,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Career Restricted Stock Units were granted to the Reporting Person for no consideration pursuant to the Issuer's Career Shares Program under its 2020 Stock Incentive Plan.  Each Career Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Career Restricted Stock Units generally will be paid out in shares of lssuer common stock at the time of retirement at a level determined by the grantee's attained age and years of continuous service at retirement."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Career Restricted Stock Units generally will be paid out in shares of lssuer common stock at the time of retirement at a level determined by the grantee's attained age and years of continuous service at retirement."}],"balance_after":2460,"derivative":{"underlying":"Common Stock","underlying_shares":2460},"source":{"system":"sec-edgar","filing":"0001062993-22-000684","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299322000684/form4.xml","form_type":"4"}},{"id":2529796,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Executive Chair"}}],"security":"Common Stock","published_at":"2021-11-02T20:43:45.000Z","date":"2021-10-25","kind":"gift","acquired":false,"shares":10000,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On October 25, 2021, the reporting person gifted 10,000 shares of Common Stock from the William S. Boyd Gaming Properties Trust (\"WSBGPT\") to The Boyd Foundation."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On October 25, 2021, the reporting person gifted 10,000 shares of Common Stock from the William S. Boyd Gaming Properties Trust (\"WSBGPT\") to The Boyd Foundation."}],"balance_after":19372370,"source":{"system":"sec-edgar","filing":"0001062993-21-010120","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000106299321010120/form4.xml","form_type":"4"}},{"id":2721649,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2021-05-10T23:03:13.000Z","date":"2021-05-04","kind":"gift","acquired":false,"shares":14000,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On May 4, 2021, the reporting person gifted 14,000 shares of Common Stock from the William S. Boyd Gaming Properties Trust (\"WSBGPT\") to The Boyd Foundation."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On May 4, 2021, the reporting person gifted 14,000 shares of Common Stock from the William S. Boyd Gaming Properties Trust (\"WSBGPT\") to The Boyd Foundation."}],"balance_after":19382370,"source":{"system":"sec-edgar","filing":"0001421390-21-000037","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000142139021000037/edgar.xml","form_type":"4"}},{"id":2816295,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2021-03-03T22:49:49.000Z","date":"2021-03-01","kind":"grant","acquired":true,"shares":10801,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares underlying Performance Share Units that vested on March 1, 2021."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. 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Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest at the rate of 33.333% per year on the first day of each successive 12 month period commencing one year from grant date.   The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2020 Stock Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The Reporting Person was awarded 20,000 Restricted Stock Units for no consideration pursuant to the Issuer's 2020 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest at the rate of 33.333% per year on the first day of each successive 12 month period commencing one year from grant date.   The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2020 Stock Incentive Plan."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19385569,"source":{"system":"sec-edgar","filing":"0001421390-21-000013","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/906553/000142139021000013/edgar.xml","form_type":"4"}},{"id":2844334,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2021-02-22T23:40:48.000Z","date":"2021-02-18","kind":"grant","acquired":true,"shares":14508,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The Reporting Person was awarded 14,508 Restricted Stock Units for no consideration pursuant to the Issuer's 2020 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full upon the third anniversary of the date of award.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2020 Stock Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Reporting Person was awarded 14,508 Restricted Stock Units for no consideration pursuant to the Issuer's 2020 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full upon the third anniversary of the date of award.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2020 Stock Incentive Plan."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19365569,"source":{"system":"sec-edgar","filing":"0001421390-21-000013","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000142139021000013/edgar.xml","form_type":"4"}},{"id":2906581,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2021-01-15T21:30:49.000Z","date":"2021-01-14","kind":"gift","acquired":false,"shares":1040,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 14, 2021, the reporting person gifted 1,040 shares of Common Stock (the \"Shares\") from William S. Boyd Gaming Properties Trust  (\"WSBGPT\") to the education trusts of the following grandchildren in the amounts specified in brackets: The Taylor Joseph Boyd Education Trust Dated 7/1/97 (208 shares);  The William Samuel Boyd Education Trust Dated 7/1/97 (208 shares),; The Josef William Boyd Education Trust Dated  7/1/97 (208 shares); The Justin Boyd Education Trust Dated 11/1/99 (208 shares); and Sean William Johnson Education Trust Dated 7/1/97 (208 shares)."}],"balance_after":19351061,"source":{"system":"sec-edgar","filing":"0001421390-21-000010","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000142139021000010/edgar.xml","form_type":"4"}},{"id":2917243,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Career Restricted Stock Units","published_at":"2021-01-06T21:47:04.000Z","date":"2021-01-04","kind":"grant","acquired":true,"shares":3793,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Career Restricted Stock Units were granted to the Reporting Person for no consideration pursuant to the Issuer's Career Shares Program under its 2020 Stock Incentive Plan.  Each Career Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Career Restricted Stock Units will be paid out in shares of Issuer common stock at the time of retirement based upon the Reporting Person's/grantee's attained age and years of continuous service at the time of retirement.  To receive any payout under the Career Shares Program, grantees must be at least 55 years old and must have been continually employed by the Issuer for a minimum of 10 years.  Retirement after 10 years of service will entitle a grantee to 50 percent of his or her Career Restricted Stock Units.  This increases to 75 percent after 15 years and 100 percent following 20 years of employment.  In the event of grantee's death or permanent disability, or following a change in control of Issuer, the grantee will be deemed to have attained age 55 and the Career Restricted Stock Units will immediately vest and convert into shares of Issuer common stock based on the grantee's years of continuous service through the date of death, termination resulting from permanent disability or the change in control, as applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Career Restricted Stock Units will be paid out in shares of Issuer common stock at the time of retirement based upon the Reporting Person's/grantee's attained age and years of continuous service at the time of retirement.  To receive any payout under the Career Shares Program, grantees must be at least 55 years old and must have been continually employed by the Issuer for a minimum of 10 years.  Retirement after 10 years of service will entitle a grantee to 50 percent of his or her Career Restricted Stock Units.  This increases to 75 percent after 15 years and 100 percent following 20 years of employment.  In the event of grantee's death or permanent disability, or following a change in control of Issuer, the grantee will be deemed to have attained age 55 and the Career Restricted Stock Units will immediately vest and convert into shares of Issuer common stock based on the grantee's years of continuous service through the date of death, termination resulting from permanent disability or the change in control, as applicable."}],"balance_after":3793,"derivative":{"underlying":"Common Stock","underlying_shares":3793},"source":{"system":"sec-edgar","filing":"0001421390-21-000002","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000142139021000002/edgar.xml","form_type":"4"}},{"id":2943417,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2020-12-16T21:22:27.000Z","date":"2020-12-14","kind":"gift","acquired":false,"shares":50000,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On December 14, 2020, the reporting person gifted 50,000 shares of Common Stock from William S. Boyd Gaming Properties Trust (\"WSBGPT\") to The Boyd Foundation."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On December 14, 2020, the reporting person gifted 50,000 shares of Common Stock from William S. Boyd Gaming Properties Trust (\"WSBGPT\") to The Boyd Foundation."}],"balance_after":19352101,"source":{"system":"sec-edgar","filing":"0001421390-20-000038","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000142139020000038/edgar.xml","form_type":"4"}},{"id":3162102,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2020-05-05T20:24:30.000Z","date":"2020-05-01","kind":"purchase","acquired":true,"shares":100000,"price":16.0745,"value":1607450.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19402101,"source":{"system":"sec-edgar","filing":"0001421390-20-000017","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000142139020000017/edgar.xml","form_type":"4"}},{"id":3239455,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2020-03-02T23:12:16.000Z","date":"2020-02-27","kind":"grant","acquired":true,"shares":31843,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares underlying Performance Share Units that vested on February 27, 2020."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19302101,"source":{"system":"sec-edgar","filing":"0001421390-20-000009","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000142139020000009/edgar.xml","form_type":"4"}},{"id":3310079,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2020-01-16T23:37:10.000Z","date":"2020-01-14","kind":"gift","acquired":false,"shares":1680,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 14, 2020, the reporting person gifted 1,680 shares of Common Stock (the \"Shares\") from William S. Boyd Gaming Properties Trust  (\"WSBGPT\") to the education trusts of the following grandchildren in the amounts specified in brackets: The Taylor Joseph Boyd Education Trust Dated 7/1/97 (336 shares);  The William Samuel Boyd Education Trust Dated 7/1/97 (336 shares),; The Josef William Boyd Education Trust Dated  7/1/97 (336 shares); The Justin Boyd Education Trust Dated 11/1/99 (336 shares); and Sean William Johnson Education Trust Dated 7/1/97 (336 shares)."}],"balance_after":19270258,"source":{"system":"sec-edgar","filing":"0001421390-20-000005","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000142139020000005/edgar.xml","form_type":"4"}},{"id":3315615,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2020-01-08T23:19:25.000Z","date":"2019-12-23","kind":"gift","acquired":false,"shares":50000,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On December 23, 2019, the reporting person gifted 50,000 shares of Common Stock from William S. Boyd Gaming Properties Trust (\"WSBGPT\") to The Boyd Foundation."}],"balance_after":19271938,"source":{"system":"sec-edgar","filing":"0001421390-20-000003","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000142139020000003/edgar.xml","form_type":"4"}},{"id":3319816,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Career Restricted Stock Units","published_at":"2020-01-06T22:27:52.000Z","date":"2020-01-02","kind":"grant","acquired":true,"shares":5316,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Career Restricted Stock Units were granted to the Reporting Person for no consideration pursuant to the Issuer's Career Shares Program under its 2012 Stock Incentive Plan. Each Career Restricted Stock Unit represents a contingent right to receive one share of lssuer common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Career Restricted Stock Units will be paid out in shares of lssuer common stock at the time of retirement based upon the grantee's attained age and years of continuous service at retirement. To receive any payout, grantees must be at least 55 years old and must have been continually employed by the Issuer for a minimum of 10 years. Retirement after 10 years of service will entitle a grantee to 50 percent of his or her Career Restricted Stock Units. This increases to 75 percent after 15 years and 100 percent following 20 years of employment. In the event of death or permanent disability, or following a change in control of lssuer, the grantee will be deemed to have attained age 55 and the Career Restricted Stock Units will immediately vest and convert into shares of lssuer common stock based on the grantee's years of continuous service through the date of death, termination resulting from permanent disability or the change in control."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Career Restricted Stock Units will be paid out in shares of lssuer common stock at the time of retirement based upon the grantee's attained age and years of continuous service at retirement. To receive any payout, grantees must be at least 55 years old and must have been continually employed by the Issuer for a minimum of 10 years. Retirement after 10 years of service will entitle a grantee to 50 percent of his or her Career Restricted Stock Units. This increases to 75 percent after 15 years and 100 percent following 20 years of employment. In the event of death or permanent disability, or following a change in control of lssuer, the grantee will be deemed to have attained age 55 and the Career Restricted Stock Units will immediately vest and convert into shares of lssuer common stock based on the grantee's years of continuous service through the date of death, termination resulting from permanent disability or the change in control."}],"balance_after":5316,"derivative":{"underlying":"Common Stock","underlying_shares":5316},"source":{"system":"sec-edgar","filing":"0001209191-20-002035","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000120919120002035/doc4.xml","form_type":"4"}},{"id":3350229,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2019-12-06T23:31:23.000Z","date":"2019-12-04","kind":"grant","acquired":true,"shares":19500,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"* The Reporting Person was awarded 19,500 Restricted Stock Units for no consideration pursuant to the Issuer's 2012 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full upon the third anniversary of the date of award.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2012 Stock Incentive Plan."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. 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Vesting plan calls for options to become exercisable at the rate of 33.333% per year on the first day of each successive 12 month period commencing one year from grant date."}],"balance_after":0,"derivative":{"exercise_price":17.75,"expiration_date":"2026-11-08","underlying":"Common Stock","underlying_shares":23924},"source":{"system":"sec-edgar","filing":"0001186747-19-000057","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674719000057/edgar.xml","form_type":"4"}},{"id":3370483,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2019-11-15T21:48:07.000Z","date":"2019-11-13","kind":"exercise","acquired":true,"shares":23924,"price":17.75,"value":424651.0,"ownership":{"direct":false,"nature":"By Trust*"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. 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Boyd Gaming Properties Trust (\"WSBGPT\") to The Boyd Foundation."}],"balance_after":19278514,"source":{"system":"sec-edgar","filing":"0001186747-19-000047","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674719000047/edgar.xml","form_type":"4"}},{"id":3481778,"issuer":{"id":3616,"kind":"organization","name":"WESTERN ALLIANCE BANCORPORATION","symbol":"WAL"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Director Emeritus"}}],"security":"Common Stock","published_at":"2019-06-21T20:55:02.000Z","date":"2019-05-17","kind":"purchase","acquired":true,"shares":2500,"price":45.25,"value":113125.0,"ownership":{"direct":false,"nature":"The Judy Boyd Living Trust dated March 16, 2017"},"balance_after":2500,"source":{"system":"sec-edgar","filing":"0001212545-19-000099","document":"wf-form4_156115048719573.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/940434/000121254519000099/wf-form4_156115048719573.xml","form_type":"4"}},{"id":3566464,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2019-04-04T00:30:52.000Z","date":"2019-03-29","kind":"gift","acquired":false,"shares":50000,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On March 29, 2019, the reporting person gifted 50,000 shares of Common Stock from William S. Boyd Gaming Properties Trust (\"WSBGPT\") to The Boyd Foundation."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Amended to correct the number of shares held directly by the reporting person on January 2, 2019."}],"balance_after":19378514,"source":{"system":"sec-edgar","filing":"0001186747-19-000036","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674719000036/edgar.xml","form_type":"4/A","original_submission_date":"2019-04-02"}},{"id":3570215,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2019-04-02T23:01:02.000Z","date":"2019-03-29","kind":"gift","acquired":false,"shares":50000,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On March 29, 2019, the reporting person gifted 50,000 shares of Common Stock from William S. 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Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full upon the third anniversary of the date of award.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2012 Stock Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Reporting Person was awarded 18,911 Restricted Stock Units for no consideration pursuant to the Issuer's 2012 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full upon the third anniversary of the date of award.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2012 Stock Incentive Plan."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. 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Boyd Gaming Properties Trust  (\"WSBGPT\") to the education trusts of the following grandchildren in the amounts specified in brackets: The Aysia Lynn Boyd 1997 Education Trust (478 shares), The Taylor Joseph Boyd 1997 Education Trust (478 shares), The Josef William Boyd 1997 Education Trust (478 shares), The T'Mir Kathleen Boyd 1997 Education Trust (478 shares), The William Samuel Boyd 1997 Education Trust (478 shares), The Sean William Johnson 1997 Education Trust (478 shares), and The Justin Boyd 1999 Education Trust (478 shares)."}],"balance_after":19288677,"source":{"system":"sec-edgar","filing":"0001186747-19-000011","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674719000011/edgar.xml","form_type":"4"}},{"id":3710706,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Career Restricted Stock Units","published_at":"2019-01-03T21:13:06.000Z","date":"2019-01-02","kind":"grant","acquired":true,"shares":7511,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Career Restricted Stock Units were granted to the Reporting Person for no consideration pursuant to the Issuer's Career Shares Program under its 2012 Stock Incentive Plan.  Each Career Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Career Restricted Stock Units will be paid out in shares of Issuer common stock at the time of retirement based upon the Reporting Person's/grantee's attained age and years of continuous service at the time of retirement.  To receive any payout under the Career Shares Program, grantees must be at least  years 55 years old and must have been continually employed by the Issuer for a minimum of 10 years.  Retirement after 10 years of service will entitle a grantee to 50 percent of his or her Career Restricted Stock Units.  This increases to 75 percent after 15 years and 100 percent following 20 years of employment.  In the event of grantee's death or permanent disability, or following a change in control of Issuer, the grantee will be deemed to have attained age 55 and the Career Restricted Stock Units will immediately vest and convert into shares of Issuer common stock based on the grantee's years of continuous service through the date of death, termination resulting from permanent disability or the change in control, as applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Career Restricted Stock Units will be paid out in shares of Issuer common stock at the time of retirement based upon the Reporting Person's/grantee's attained age and years of continuous service at the time of retirement.  To receive any payout under the Career Shares Program, grantees must be at least  years 55 years old and must have been continually employed by the Issuer for a minimum of 10 years.  Retirement after 10 years of service will entitle a grantee to 50 percent of his or her Career Restricted Stock Units.  This increases to 75 percent after 15 years and 100 percent following 20 years of employment.  In the event of grantee's death or permanent disability, or following a change in control of Issuer, the grantee will be deemed to have attained age 55 and the Career Restricted Stock Units will immediately vest and convert into shares of Issuer common stock based on the grantee's years of continuous service through the date of death, termination resulting from permanent disability or the change in control, as applicable."}],"balance_after":7511,"derivative":{"underlying":"Common Stock","underlying_shares":7511},"source":{"system":"sec-edgar","filing":"0001186747-19-000003","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674719000003/edgar.xml","form_type":"4"}},{"id":3714882,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2019-01-03T00:38:38.000Z","date":"2018-12-21","kind":"gift","acquired":false,"shares":50000,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On December 21, 2018, the reporting person gifted 50,000 shares of Common Stock (the \"Shares\") from William S. Boyd Gaming Properties Trust  (\"WSBGPT\") to The Boyd Foundation."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. Boyd Gaming Properties Trust (\"WSBGPT\") of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19372464,"source":{"system":"sec-edgar","filing":"0001186747-19-000001","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674719000001/edgar.xml","form_type":"4"}},{"id":3731285,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-12-14T23:20:23.000Z","date":"2018-12-12","kind":"exercise","acquired":true,"shares":26936,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Options granted under Boyd Gaming Corporation 2012 Flexible Stock Option Plan.  Vesting plan calls for options to become exercisable at the rate of 33.333% per year on the first day of each successive 12 month period commencing one year from grant date."}],"balance_after":0,"derivative":{"exercise_price":19.98,"expiration_date":"2025-10-29","underlying":"Common Stock","underlying_shares":26936},"source":{"system":"sec-edgar","filing":"0001186747-18-000063","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674718000063/edgar.xml","form_type":"4"}},{"id":3731284,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2018-12-14T23:20:23.000Z","date":"2018-12-12","kind":"exercise","acquired":true,"shares":26936,"price":19.98,"value":538181.28,"ownership":{"direct":false,"nature":"By Trust*"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. Boyd Gaming Properties Trust (\"WSBGPT\") of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19422464,"source":{"system":"sec-edgar","filing":"0001186747-18-000063","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674718000063/edgar.xml","form_type":"4"}},{"id":3740259,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2018-12-07T23:28:15.000Z","date":"2018-12-05","kind":"grant","acquired":true,"shares":20826,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The Reporting Person was awarded 20,826 Restricted Stock Units for no consideration pursuant to the Issuer's 2012 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full upon the third anniversary of the date of award.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2012 Stock Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Reporting Person was awarded 20,826 Restricted Stock Units for no consideration pursuant to the Issuer's 2012 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full upon the third anniversary of the date of award.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2012 Stock Incentive Plan."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19395528,"source":{"system":"sec-edgar","filing":"0001186747-18-000061","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674718000061/edgar.xml","form_type":"4"}},{"id":3853968,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-08-03T20:46:10.000Z","date":"2018-08-02","kind":"exercise","acquired":false,"shares":33473,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Options granted under Boyd Gaming Corporation 2012 Flexible Stock Option Plan.  Vesting plan calls for options to become exercisable at the rate of 33.333% per year on the first day of each successive 12 month period commencing one year from grant date."}],"balance_after":0,"derivative":{"exercise_price":11.57,"expiration_date":"2024-12-10","underlying":"Common Stock","underlying_shares":33473},"source":{"system":"sec-edgar","filing":"0001186747-18-000041","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674718000041/edgar.xml","form_type":"4"}},{"id":3853967,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2018-08-03T20:46:10.000Z","date":"2018-08-02","kind":"exercise","acquired":true,"shares":33473,"price":11.57,"value":387282.61,"ownership":{"direct":false,"nature":"By Trust*"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. Boyd Gaming Properties Trust (\"WSBGPT\") of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19374702,"source":{"system":"sec-edgar","filing":"0001186747-18-000041","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674718000041/edgar.xml","form_type":"4"}},{"id":4028433,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2018-02-28T23:24:19.000Z","date":"2018-02-26","kind":"grant","acquired":true,"shares":52552,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares underlying Performance Share Units that vested on February 26, 2018."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19341229,"source":{"system":"sec-edgar","filing":"0001186747-18-000016","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674718000016/edgar.xml","form_type":"4"}},{"id":4082421,"issuer":{"id":3616,"kind":"organization","name":"WESTERN ALLIANCE BANCORPORATION","symbol":"WAL"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-02-01T22:55:32.000Z","date":"2018-01-30","kind":"grant","acquired":true,"shares":3750,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":3750,"source":{"system":"sec-edgar","filing":"0001212545-18-000040","document":"wf-form4_151752571695837.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/940434/000121254518000040/wf-form4_151752571695837.xml","form_type":"4"}},{"id":4095020,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2018-01-19T23:56:16.000Z","date":"2018-01-03","kind":"gift","acquired":false,"shares":2023,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 3, 2018, the reporting person gifted 2,023 shares of Common Stock (the \"Shares\") from William S. Boyd Gaming Properties Trust  (\"WSBGPT\") to the education trusts of the following grandchildren in the amounts specified in brackets: The Aysia Lynn Boyd 1997 Education Trust (289 shares), The Taylor Joseph Boyd 1997 Education Trust (289 shares), The Josef William Boyd 1997 Education Trust (289 shares), The T'Mir Kathleen Boyd 1997 Education Trust (289 shares), The William Samuel Boyd 1997 Education Trust (289 shares), The Sean William Johnson 1997 Education Trust (289 shares), and The Justin Boyd 1999 Education Trust (289 shares)."}],"balance_after":19288677,"source":{"system":"sec-edgar","filing":"0001186747-18-000010","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674718000010/edgar.xml","form_type":"4"}},{"id":4108849,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Career Restricted Stock Units","published_at":"2018-01-04T22:31:45.000Z","date":"2018-01-02","kind":"grant","acquired":true,"shares":4633,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Career Restricted Stock Units were granted to the Reporting Person for no consideration pursuant to the Issuer's Career Shares Program under its 2012 Stock Incentive Plan.  Each Career Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Career Restricted Stock Units will be paid out in shares of Issuer common stock at the time of retirement based upon the Reporting Person's/grantee's attained age and years of continuous service at the time of retirement.  To receive any payout under the Career Shares Program, grantees must be at least  years 55 years old and must have been continually employed by the Issuer for a minimum of 10 years.  Retirement after 10 years of service will entitle a grantee to 50 percent of his or her Career Restricted Stock Units.  This increases to 75 percent after 15 years and 100 percent following 20 years of employment.  In the event of grantee's death or permanent disability, or following a change in control of Issuer, the grantee will be deemed to have attained age 55 and the Career Restricted Stock Units will immediately vest and convert into shares of Issuer common stock based on the grantee's years of continuous service through the date of death, termination resulting from permanent disability or the change in control, as applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Career Restricted Stock Units will be paid out in shares of Issuer common stock at the time of retirement based upon the Reporting Person's/grantee's attained age and years of continuous service at the time of retirement.  To receive any payout under the Career Shares Program, grantees must be at least  years 55 years old and must have been continually employed by the Issuer for a minimum of 10 years.  Retirement after 10 years of service will entitle a grantee to 50 percent of his or her Career Restricted Stock Units.  This increases to 75 percent after 15 years and 100 percent following 20 years of employment.  In the event of grantee's death or permanent disability, or following a change in control of Issuer, the grantee will be deemed to have attained age 55 and the Career Restricted Stock Units will immediately vest and convert into shares of Issuer common stock based on the grantee's years of continuous service through the date of death, termination resulting from permanent disability or the change in control, as applicable."}],"balance_after":4633,"derivative":{"underlying":"Common Stock","underlying_shares":4633},"source":{"system":"sec-edgar","filing":"0001186747-18-000004","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674718000004/edgar.xml","form_type":"4"}},{"id":4133909,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2017-12-13T23:02:07.000Z","date":"2017-12-11","kind":"tax_withholding","acquired":false,"shares":14041,"price":32.03,"value":449733.23,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19290700,"source":{"system":"sec-edgar","filing":"0001186747-17-000059","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674717000059/edgar.xml","form_type":"4"}},{"id":4169482,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2017-11-08T23:26:41.000Z","date":"2017-10-27","kind":"gift","acquired":false,"shares":17400,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On October 27, 2017, the reporting person gifted 17,400 shares of Common Stock (the \"Shares\") from William S. Boyd Gaming Properties Trust  (\"WSBGPT\") in the amounts specified in brackets: The Samuel J. Boyd Gaming Properties Trust [5,800 shares], the Marianne E. Boyd Johnson Gaming Properties Trust [5,800 shares], and the William R. Boyd Gaming Properties Trust [5,800 shares]."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. Boyd Gaming Properties Trust (\"WSBGPT\") of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19304741,"source":{"system":"sec-edgar","filing":"0001186747-17-000054","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674717000054/edgar.xml","form_type":"4"}},{"id":4173598,"issuer":{"id":3838,"kind":"organization","name":"BOYD GAMING CORP"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2017-11-03T21:23:55.000Z","date":"2017-11-02","kind":"grant","acquired":true,"shares":21605,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The Reporting Person was awarded 21,605 Restricted Stock Units for no consideration pursuant to the Issuer's 2012 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full upon the third anniversary of the date of award.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2012 Stock Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Reporting Person was awarded 21,605 Restricted Stock Units for no consideration pursuant to the Issuer's 2012 Stock Incentive Plan.  Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting.  The Restricted Stock Units will vest in full upon the third anniversary of the date of award.  The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2012 Stock Incentive Plan."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"By William S. Boyd Gaming Properties Trust, of which reporting person is the trustee, settlor and beneficiary."}],"balance_after":19322141,"source":{"system":"sec-edgar","filing":"0001186747-17-000046","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/906553/000118674717000046/edgar.xml","form_type":"4"}},{"id":4180853,"issuer":{"id":3616,"kind":"organization","name":"WESTERN ALLIANCE BANCORPORATION","symbol":"WAL"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-10-25T21:02:52.000Z","date":"2017-10-23","kind":"sale","acquired":false,"shares":300,"price":56.07,"value":16821.0,"ownership":{"direct":false,"nature":"William S. Boyd Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $56.05 to $56.09, inclusive. The reporting person undertakes to provide to Western Alliance Bancorporation, any security holder of Western Alliance Bancorporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within this range."}],"balance_after":4001439,"source":{"system":"sec-edgar","filing":"0001212545-17-000193","document":"wf-form4_150896535772759.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/940434/000121254517000193/wf-form4_150896535772759.xml","form_type":"4"}},{"id":4180852,"issuer":{"id":3616,"kind":"organization","name":"WESTERN ALLIANCE BANCORPORATION","symbol":"WAL"},"owners":[{"id":93019,"kind":"person","name":"BOYD WILLIAM S","position":1,"cik":"0000940434","reported_name":"BOYD WILLIAM S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-10-25T21:02:52.000Z","date":"2017-10-23","kind":"sale","acquired":false,"shares":9700,"price":55.53,"value":538641.0,"ownership":{"direct":false,"nature":"William S. Boyd Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $55.00 to $55.91, inclusive. The reporting person undertakes to provide to Western Alliance Bancorporation, any security holder of Western Alliance Bancorporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within this range."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On July 28, 2017, the Reporting Person transferred 4,000 shares form Direct holdings to the William S. 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The price reported above reflects the weighted average sale price.  The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"By William S. 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The price reported above reflects the weighted average sale price.  The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"By William S. 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