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Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. 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The number of PSAs earned is based on the issuer's achievement of relative total shareholder return (\"TSR\") measured versus the MSCI US REIT Index over a three-year performance period ending December 31, 2023, and the number of shares earned may range from 25% to 175%. The PSAs are earned as follows: (i) 20% of the PSAs are earned upon TSR achievement in year one of the performance period, (ii) 20% of the PSAs are earned upon TSR achievement in year two of the performance period, (iii) 20% of the PSAs are earned upon TSR achievement in year three of the performance period, and (iv) 40% of the PSAs are earned upon a cumulative TSR achievement over the three-year performance period, subject to the reporting person's continued service with the issuer at the end of the three-year performance period. 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The restricted stock vests in three equal annual installments beginning on March 15, 2022, provided that the reporting person remains in continuous service with the issuer as of each vesting date."}],"balance_after":205220,"source":{"system":"sec-edgar","filing":"0001209191-21-021560","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919121021560/doc4.xml","form_type":"4"}},{"id":2806082,"issuer":{"id":131960,"kind":"organization","name":"CoreSite Realty Corp","symbol":"COR"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-03-05T19:38:19.000Z","date":"2021-03-04","kind":"sale","acquired":false,"shares":8233,"price":109.12,"value":898384.96,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The shares were sold pursuant to a sales plan adopted by the reporting person and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934."},{"field":"shares","element":"transactionShares","label":"F3","text":"Represents shares sold by the reporting person to cover tax obligations upon the vesting of restricted stock."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. 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The reporting person undertakes to provide to the issuer, any shareholder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":89560,"source":{"system":"sec-edgar","filing":"0001209191-18-019592","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919118019592/doc4.xml","form_type":"4"}},{"id":4096205,"issuer":{"id":131960,"kind":"organization","name":"CoreSite Realty Corp","symbol":"COR"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Restricted Stock Units","published_at":"2018-01-18T18:10:56.000Z","date":"2018-01-16","kind":"grant","acquired":true,"shares":143,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of common stock of the issuer. The reporting person also holds a\ntandem Dividend Equivalent for each RSU held, which gives the reporting person the right to receive, upon the payment of any ordinary quarterly\ncash dividend paid to holders of common stock of the issuer, an equivalent payment in the form of additional RSUs based on the fair market\nvalue of the issuer's common stock on the date of payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest immediately. Pursuant to a deferral election made by the reporting person, vested RSUs are payable upon the earliest of (a) the\nreporting person's separation from service with the issuer, (b) the reporting person's death or (c) the date of a change in control of the issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs have no expiration date."}],"balance_after":15762,"derivative":{"underlying":"Common Stock","underlying_shares":143},"source":{"system":"sec-edgar","filing":"0001209191-18-004362","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919118004362/doc4.xml","form_type":"4"}},{"id":4100512,"issuer":{"id":4287,"kind":"organization","name":"Four Corners Property Trust, Inc.","symbol":"FCPT"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-01-12T20:47:14.000Z","date":"2018-01-12","kind":"other","acquired":true,"shares":105,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. 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The reporting person also holds a\ntandem Dividend Equivalent for each RSU held, which gives the reporting person the right to receive, upon the payment of any ordinary\nquarterly cash dividend paid to holders of common stock of the issuer, an equivalent payment in the form of additional RSUs based on the fair\nmarket value of the issuer's common stock on the date of payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest immediately. Pursuant to a deferral election made by\nthe reporting person, vested RSUs are payable upon the earliest of (a) the reporting person's separation from service with the issuer, (b) the\nreporting person's death or (c) the date of a change in control of the issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs have no expiration date."}],"balance_after":15619,"derivative":{"underlying":"Common Stock","underlying_shares":125},"source":{"system":"sec-edgar","filing":"0001209191-17-057325","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919117057325/doc4.xml","form_type":"4"}},{"id":4184895,"issuer":{"id":4287,"kind":"organization","name":"Four Corners Property Trust, Inc.","symbol":"FCPT"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-10-17T18:58:13.000Z","date":"2017-10-13","kind":"other","acquired":true,"shares":76,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."}],"balance_after":15847,"source":{"system":"sec-edgar","filing":"0001123292-17-001603","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000112329217001603/edgar.xml","form_type":"4"}},{"id":4210424,"issuer":{"id":131960,"kind":"organization","name":"CoreSite Realty Corp","symbol":"COR"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common 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The reporting person also holds a tandem Dividend Equivalent for each RSU held, which gives the reporting person the right to receive, upon the payment of any ordinary quarterly cash dividend paid to holders of common stock of the issuer, an equivalent payment in the form of additional RSUs based on the fair market value of the issuer's common stock on the date of payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest immediately. Pursuant to a deferral election made by the reporting person, vested RSUs are payable upon the earliest of (a) the reporting person's separation from service with the issuer, (b) the reporting person's death or (c) the date of a change in control of the issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs have no expiration date."}],"balance_after":15494,"derivative":{"underlying":"Common Stock","underlying_shares":133},"source":{"system":"sec-edgar","filing":"0001209191-17-045768","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919117045768/doc4.xml","form_type":"4"}},{"id":4254527,"issuer":{"id":4287,"kind":"organization","name":"Four Corners Property Trust, Inc.","symbol":"FCPT"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-07-19T16:05:01.000Z","date":"2017-07-17","kind":"other","acquired":true,"shares":75,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."}],"balance_after":15772,"source":{"system":"sec-edgar","filing":"0001123292-17-001285","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000112329217001285/edgar.xml","form_type":"4"}},{"id":4348649,"issuer":{"id":4287,"kind":"organization","name":"Four Corners Property Trust, Inc.","symbol":"FCPT"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-04-20T10:50:35.000Z","date":"2017-04-17","kind":"other","acquired":true,"shares":79,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."}],"balance_after":15696,"source":{"system":"sec-edgar","filing":"0001123292-17-000858","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000112329217000858/edgar.xml","form_type":"4"}},{"id":4349742,"issuer":{"id":131960,"kind":"organization","name":"CoreSite Realty Corp","symbol":"COR"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Restricted Stock Units","published_at":"2017-04-19T21:25:54.000Z","date":"2017-04-17","kind":"grant","acquired":true,"shares":131,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of common stock of the issuer. The reporting person also holds a tandem Dividend Equivalent (\"DE\") for each RSU held, which gives the reporting person the right to receive, upon the payment of any ordinary quarterly cash dividend paid to holders of common stock of the issuer, an equivalent payment in the form of additional RSUs based on the fair market value of the issuer's common stock on the date of payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"One hundred sixteen (116) RSUs vest immediately with the remaining RSUs vesting on May 19, 2017. Pursuant to a deferral election made by the reporting person, vested RSUs are payable upon the earliest of (a) the reporting person's separation from service with the issuer, (b) the reporting person's death or (c) the date of a change in control of the issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs have no expiration date."}],"balance_after":15361,"derivative":{"underlying":"Common Stock","underlying_shares":131},"source":{"system":"sec-edgar","filing":"0001209191-17-027608","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919117027608/doc4.xml","form_type":"4"}},{"id":4388702,"issuer":{"id":4287,"kind":"organization","name":"Four Corners Property Trust, Inc.","symbol":"FCPT"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-03-13T19:01:56.000Z","date":"2017-01-13","kind":"other","acquired":true,"shares":90,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."}],"balance_after":15618,"source":{"system":"sec-edgar","filing":"0001123292-17-000675","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000112329217000675/edgar.xml","form_type":"4"}},{"id":4390772,"issuer":{"id":131960,"kind":"organization","name":"CoreSite Realty Corp","symbol":"COR"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2017-03-10T20:02:19.000Z","date":"2017-03-08","kind":"grant","acquired":true,"shares":19607,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents performance-based restricted shares (\"PSAs\") granted under the issuer's 2010 Equity Incentive Award Plan. The number of PSAs earned is based on the issuer's achievement of relative total shareholder return (\"TSR\") measured versus the MSCI US REIT Index over a three-year performance period ending December 31, 2019, and the number of shares earned may range from 25% to 175%. The PSAs are earned as follows: (i) 20% of the PSAs are earned upon TSR achievement in year one of the performance period, (ii) 20% of the PSAs are earned upon TSR achievement in year two of the performance period, (iii) 20% of the PSAs are earned upon TSR achievement in year three of the performance period, and (iv) 40% of the PSAs are earned upon a cumulative TSR achievement over the three-year performance period, subject to the reporting person's continued employment with the issuer at the end of the three-year performance period. 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The restricted stock vests in three equal annual installments beginning on March 8, 2018, provided that the reporting person remains employed by the issuer as of each vesting date."}],"balance_after":76368,"source":{"system":"sec-edgar","filing":"0001209191-17-019988","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919117019988/doc4.xml","form_type":"4"}},{"id":4486629,"issuer":{"id":131960,"kind":"organization","name":"CoreSite Realty Corp","symbol":"COR"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Restricted Stock Units","published_at":"2017-01-19T19:17:42.000Z","date":"2017-01-17","kind":"grant","acquired":true,"shares":144,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of common stock of the issuer. The reporting person also holds a tandem Dividend Equivalent (\"DE\") for each RSU held, which gives the reporting person the right to receive, upon the payment of any ordinary quarterly cash dividend paid to holders of common stock of the issuer, an equivalent payment in the form of additional RSUs based on the fair market value of the issuer's common stock on the date of payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"One hundred twenty-eight (128) RSUs vest immediately with the remaining RSUs vesting on May 19, 2017. Pursuant to a deferral election made by the reporting person, vested RSUs are payable upon the earliest of (a) the reporting person's separation from service with the issuer, (b) the reporting person's death or (c) the date of a change in control of the issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs have no expiration date."}],"balance_after":15230,"derivative":{"underlying":"Common Stock","underlying_shares":144},"source":{"system":"sec-edgar","filing":"0001209191-17-004662","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919117004662/doc4.xml","form_type":"4"}},{"id":4511302,"issuer":{"id":4287,"kind":"organization","name":"Four Corners Property Trust, Inc.","symbol":"FCPT"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2016-12-28T17:01:46.000Z","date":"2016-12-23","kind":"grant","acquired":true,"shares":3258,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":15528,"source":{"system":"sec-edgar","filing":"0001123292-16-003121","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000112329216003121/edgar.xml","form_type":"4"}},{"id":4531476,"issuer":{"id":131960,"kind":"organization","name":"CoreSite Realty Corp","symbol":"COR"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2016-12-06T19:48:02.000Z","date":"2016-12-05","kind":"purchase","acquired":true,"shares":7000,"price":68.92,"value":482440.0,"ownership":{"direct":true},"balance_after":59561,"source":{"system":"sec-edgar","filing":"0001209191-16-153755","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919116153755/doc4.xml","form_type":"4"}},{"id":4577591,"issuer":{"id":131960,"kind":"organization","name":"CoreSite Realty Corp","symbol":"COR"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Restricted Stock Units","published_at":"2016-10-19T21:21:12.000Z","date":"2016-10-17","kind":"grant","acquired":true,"shares":103,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of common stock of the issuer. The reporting person also holds a tandem Dividend Equivalent (\"DE\") for each RSU held, which gives the reporting person the right to receive, upon the payment of any ordinary quarterly cash dividend paid to holders of common stock of the issuer, an equivalent payment in the form of additional RSUs based on the fair market value of the issuer's common stock on the date of payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Ninety-one (91) RSUs vest immediately with the remaining RSUs vesting on May 19, 2017. Pursuant to a deferral election made by the reporting person, vested RSUs are payable upon the earliest of (a) the reporting person's separation from service with the issuer, (b) the reporting person's death or (c) the date of a change in control of the issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs have no expiration date."}],"balance_after":15086,"derivative":{"underlying":"Common Stock","underlying_shares":103},"source":{"system":"sec-edgar","filing":"0001209191-16-146420","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919116146420/doc4.xml","form_type":"4"}},{"id":4578294,"issuer":{"id":4287,"kind":"organization","name":"Four Corners Property Trust, Inc.","symbol":"FCPT"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2016-10-18T17:33:08.000Z","date":"2016-10-14","kind":"other","acquired":true,"shares":51,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents dividend equivalent rights that accrued on a restricted stock unit award pursuant to the dividend reinvestment feature of the award. Each dividend equivalent right is the economic equivalent of one share of the registrant's common stock and is settled in common stock."}],"balance_after":12270,"source":{"system":"sec-edgar","filing":"0001123292-16-002887","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000112329216002887/edgar.xml","form_type":"4"}},{"id":4603334,"issuer":{"id":131960,"kind":"organization","name":"CoreSite Realty Corp","symbol":"COR"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2016-09-14T18:53:04.000Z","date":"2016-09-12","kind":"grant","acquired":true,"shares":22082,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents performance-based restricted shares (\"PSAs\") granted under the issuer's 2010 Equity Incentive Award Plan. The number of PSAs earned is based on the issuer's achievement of relative total shareholder return (\"TSR\") measured versus the MSCI US REIT Index over a three-year performance period ending December 31, 2018, and the number of shares earned may range from 25% to 175%. The PSAs are earned as follows: (i) 20% of the PSAs are earned upon TSR achievement in year one of the performance period, (ii) 20% of the PSAs are earned upon TSR achievement in year two of the performance period, (iii) 20% of the PSAs are earned upon TSR achievement in year three of the performance period, and (iv) 40% of the PSAs are earned upon a cumulative TSR achievement over the three-year performance period, subject to the reporting person's continued employment with the issuer at the end of the three-year performance period. The PSAs are granted and issued at 175% of the target amount."}],"balance_after":52561,"source":{"system":"sec-edgar","filing":"0001209191-16-141470","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919116141470/doc4.xml","form_type":"4"}},{"id":4603333,"issuer":{"id":131960,"kind":"organization","name":"CoreSite Realty Corp","symbol":"COR"},"owners":[{"id":131969,"kind":"person","name":"Szurek Paul E.","position":1,"cik":"0001498577","reported_name":"Szurek Paul E.","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2016-09-14T18:53:04.000Z","date":"2016-09-12","kind":"grant","acquired":true,"shares":24479,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock granted under the issuer's 2010 Equity Incentive Award Plan. The restricted stock vests in three equal annual installments beginning on September 10, 2017, provided that the reporting person remains employed by the issuer as of each vesting date."}],"balance_after":30479,"source":{"system":"sec-edgar","filing":"0001209191-16-141470","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1498577/000120919116141470/doc4.xml","form_type":"4"}}]}