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On November 15, 2018, each restricted stock unit was disposed of pursuant to the Merger Agreement in exchange for restricted stock units of Tidewater representing a contingent right to receive 1.100 shares of common stock of Tidewater on substantially similar terms, as described in more detail in the Merger Agreement."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"As previously reported, the reporting person received a grant of restricted stock units representing a contingent right to receive the equivalent number of shares of common stock of the Issuer for no consideration that vest in one-third increments on each of the first three anniversaries of April 13, 2018.  On November 15, 2018, each restricted stock unit was disposed of pursuant to the Merger Agreement in exchange for restricted stock units of Tidewater representing a contingent right to receive 1.100 shares of common stock of Tidewater on substantially similar terms, as described in more detail in the Merger Agreement."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001437749-18-020944","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918020944/rdgdoc.xml","form_type":"4"}},{"id":3763465,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"Senior VP and CFO"}}],"security":"Common Stock","published_at":"2018-11-15T16:17:01.000Z","date":"2018-11-15","kind":"disposition_to_issuer","acquired":false,"shares":196,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of common stock was disposed of pursuant to the Agreement and Plan of Merger (the \"Merger Agreement\"), dated as of July 15, 2018, between Tidewater Inc. 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In connection with such termination, the Plan participants received cash payments on October 1, 2018 in full settlement of their holdings in the Plan, including the phantom stock units and phantom warrants credited to their Plan account.   The reporting person received this cash payment in lieu of receiving any warrants or shares of common stock of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On July 15, 2018, the Company terminated the Company's Deferred Compensation Plan (the \"Plan\").  In connection with such termination, the Plan participants received cash payments on October 1, 2018 in full settlement of their holdings in the Plan, including the phantom stock units and phantom warrants credited to their Plan account.   The reporting person received this cash payment in lieu of receiving any warrants or shares of common stock of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On July 15, 2018, the Company terminated the Company's Deferred Compensation Plan (the \"Plan\").  In connection with such termination, the Plan participants received cash payments on October 1, 2018 in full settlement of their holdings in the Plan, including the phantom stock units and phantom warrants credited to their Plan account.   The reporting person received this cash payment in lieu of receiving any warrants or shares of common stock of the Company."}],"balance_after":0,"derivative":{"underlying":"WARRANTS","underlying_shares":1275.47},"source":{"system":"sec-edgar","filing":"0001437749-18-017931","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918017931/rdgdoc.xml","form_type":"4"}},{"id":3799165,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"Senior VP and CFO"}}],"security":"PHANTOM STOCK","published_at":"2018-10-03T20:20:09.000Z","date":"2018-10-01","kind":"exercise","acquired":true,"shares":117.98,"price":35.38,"value":4174.1324,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On July 15, 2018, the Company terminated the Company's Deferred Compensation Plan (the \"Plan\").  In connection with such termination, the Plan participants received cash payments on October 1, 2018 in full settlement of their holdings in the Plan, including the phantom stock units and phantom warrants credited to their Plan account.   The reporting person received this cash payment in lieu of receiving any warrants or shares of common stock of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On July 15, 2018, the Company terminated the Company's Deferred Compensation Plan (the \"Plan\").  In connection with such termination, the Plan participants received cash payments on October 1, 2018 in full settlement of their holdings in the Plan, including the phantom stock units and phantom warrants credited to their Plan account.   The reporting person received this cash payment in lieu of receiving any warrants or shares of common stock of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On July 15, 2018, the Company terminated the Company's Deferred Compensation Plan (the \"Plan\").  In connection with such termination, the Plan participants received cash payments on October 1, 2018 in full settlement of their holdings in the Plan, including the phantom stock units and phantom warrants credited to their Plan account.   The reporting person received this cash payment in lieu of receiving any warrants or shares of common stock of the Company."}],"balance_after":0,"derivative":{"underlying":"COMMON STOCK","underlying_shares":117.98},"source":{"system":"sec-edgar","filing":"0001437749-18-017931","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918017931/rdgdoc.xml","form_type":"4"}},{"id":3799164,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"Senior VP and 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(b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 72,177 shares of Predecessor Common Stock were canceled and he received 196 Shares and New Existing Equity Warrants to purchase 2,115 Shares."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 72,177 shares of Predecessor Common Stock were canceled and he received 196 Shares and New Existing Equity Warrants to purchase 2,115 Shares."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 72,177 shares of Predecessor Common Stock were canceled and he received 196 Shares and New Existing Equity Warrants to purchase 2,115 Shares."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 72,177 shares of Predecessor Common Stock were canceled and he received 196 Shares and New Existing Equity Warrants to purchase 2,115 Shares."}],"balance_after":2115,"derivative":{"exercise_price":100,"underlying":"Common Stock","underlying_shares":2115},"source":{"system":"sec-edgar","filing":"0001437749-18-005600","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005600/rdgdoc.xml","form_type":"5"}},{"id":3982260,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Common Stock, $0.01 par value","published_at":"2018-03-27T17:30:08.000Z","date":"2017-11-14","kind":"other","acquired":true,"shares":196,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Effective November 14, 2017 (the \"Effective Date\"), the Issuer emerged from bankruptcy pursuant to a Chapter 11 Plan (the \"Plan\")."},{"field":"kind","element":"transactionCoding","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 72,177 shares of Predecessor Common Stock were canceled and he received 196 Shares and New Existing Equity Warrants to purchase 2,115 Shares."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 72,177 shares of Predecessor Common Stock were canceled and he received 196 Shares and New Existing Equity Warrants to purchase 2,115 Shares."}],"balance_after":196,"source":{"system":"sec-edgar","filing":"0001437749-18-005600","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005600/rdgdoc.xml","form_type":"5"}},{"id":3982259,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Class A Common Stock, $0.01 par value","published_at":"2018-03-27T17:30:08.000Z","date":"2017-11-14","kind":"other","acquired":false,"shares":72177,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Effective November 14, 2017 (the \"Effective Date\"), the Issuer emerged from bankruptcy pursuant to a Chapter 11 Plan (the \"Plan\")."},{"field":"kind","element":"transactionCoding","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 72,177 shares of Predecessor Common Stock were canceled and he received 196 Shares and New Existing Equity Warrants to purchase 2,115 Shares."},{"field":"shares","element":"transactionShares","label":"F4","text":"The reporting person's Form 4 filed on March 28, 2017 incorrectly stated, in Column 5, due to a transcription error, the total number of shares of Predecessor Common Stock owned by the reporting person. The correct amount of shares that should have been reported was 91,868 shares of Predecessor Common Stock and not 91,109 shares of Predecessor Common Stock."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On the Effective Date, all Predecessor Common Stock was canceled and each holder of such Predecessor Common Stock, including the reporting person, received his pro rata share of (a) new shares of  the Issuer's common stock (\"Shares\"), representing in the aggregate 0.75% of the Shares, or as applicable, certain warrants (the \"Reorganized GulfMark Equity\"), subject to dilution by the Reorganized GulfMark Equity issued or issuable under the Issuer's management incentive plan (the \"MIP\") and upon exercise of the New Existing Equity Warrants (as defined below), and (b) warrants for 7.5% of the equity in the reorganized Issuer subject to dilution by the Reorganized GulfMark Equity issued or issuable under the MIP, with an exercise price based on an equity value of $1 billion (the \"New Existing Equity Warrants\").  Accordingly, the reporting person's 72,177 shares of Predecessor Common Stock were canceled and he received 196 Shares and New Existing Equity Warrants to purchase 2,115 Shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001437749-18-005600","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005600/rdgdoc.xml","form_type":"5"}},{"id":3982258,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Class A Common Stock, $0.01 par value","published_at":"2018-03-27T17:30:08.000Z","date":"2017-10-06","kind":"tax_withholding","acquired":false,"shares":19691,"price":0.183,"value":3603.453,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Transaction was a withholding and sale by the Issuer of a portion of vested restricted Class A Common Stock, $0.01 par value per share, of the Issuer outstanding immediately prior to the Effective Date (\"Predecessor Common Stock\"), to satisfy the reporting person's tax obligations upon the immediate vesting of such shares in anticipation of the Issuer's emergence from bankruptcy."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001437749-18-005600","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774918005600/rdgdoc.xml","form_type":"5"}},{"id":4352776,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Common Stock","published_at":"2017-04-13T15:15:41.000Z","date":"2016-12-31","kind":"grant","acquired":true,"shares":549,"price":1.47,"value":807.03,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The transactions reported here were made pursuant to the GulfMark Offshore, Inc. Employee Stock Purchase Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The transactions reported here were made pursuant to the GulfMark Offshore, Inc. Employee Stock Purchase Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The transactions reported here were made pursuant to the GulfMark Offshore, Inc. Employee Stock Purchase Plan."}],"balance_after":103627,"derivative":{"underlying":"Common Stock","underlying_shares":549},"source":{"system":"sec-edgar","filing":"0001437749-17-006557","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917006557/rdgdoc.xml","form_type":"5"}},{"id":4352775,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Common Stock","published_at":"2017-04-13T15:15:41.000Z","date":"2016-06-30","kind":"grant","acquired":true,"shares":210,"price":2.66,"value":558.6,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The transactions reported here were made pursuant to the GulfMark Offshore, Inc. Employee Stock Purchase Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The transactions reported here were made pursuant to the GulfMark Offshore, Inc. Employee Stock Purchase Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The transactions reported here were made pursuant to the GulfMark Offshore, Inc. Employee Stock Purchase Plan."}],"balance_after":102687,"derivative":{"underlying":"Common Stock","underlying_shares":210},"source":{"system":"sec-edgar","filing":"0001437749-17-006557","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917006557/rdgdoc.xml","form_type":"5"}},{"id":4370618,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Common Stock","published_at":"2017-03-28T18:55:17.000Z","date":"2017-03-27","kind":"tax_withholding","acquired":false,"shares":11759,"price":0.365,"value":4292.035,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Transaction was a withholding of portion of vested restricted share units to satisfy the reporting person's tax withholding obligations upon vesting, pursuant to the award agreement and associated equity incentive plan under which the award was granted."}],"balance_after":91109,"source":{"system":"sec-edgar","filing":"0001437749-17-005454","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917005454/rdgdoc.xml","form_type":"4"}},{"id":4492453,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Phantom Stock","published_at":"2017-01-12T19:18:24.000Z","date":"2016-12-30","kind":"grant","acquired":true,"shares":1196.09,"price":1.75,"value":2093.1575,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."}],"balance_after":43541.99,"derivative":{"underlying":"Common Stock","underlying_shares":1196.09},"source":{"system":"sec-edgar","filing":"0001437749-17-000616","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":24,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917000616/rdgdoc.xml","form_type":"5"}},{"id":4492452,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Phantom Stock","published_at":"2017-01-12T19:18:24.000Z","date":"2016-12-15","kind":"grant","acquired":true,"shares":1276.31,"price":1.64,"value":2093.1484,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."}],"balance_after":42345.9,"derivative":{"underlying":"Common Stock","underlying_shares":1276.31},"source":{"system":"sec-edgar","filing":"0001437749-17-000616","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":23,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917000616/rdgdoc.xml","form_type":"5"}},{"id":4492451,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Phantom Stock","published_at":"2017-01-12T19:18:24.000Z","date":"2016-11-30","kind":"grant","acquired":true,"shares":1674.52,"price":1.25,"value":2093.15,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."}],"balance_after":41069.59,"derivative":{"underlying":"Common Stock","underlying_shares":1674.52},"source":{"system":"sec-edgar","filing":"0001437749-17-000616","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":22,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917000616/rdgdoc.xml","form_type":"5"}},{"id":4492450,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Phantom Stock","published_at":"2017-01-12T19:18:24.000Z","date":"2016-11-15","kind":"grant","acquired":true,"shares":1550.48,"price":1.35,"value":2093.148,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."}],"balance_after":39395.07,"derivative":{"underlying":"Common Stock","underlying_shares":1550.48},"source":{"system":"sec-edgar","filing":"0001437749-17-000616","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":21,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917000616/rdgdoc.xml","form_type":"5"}},{"id":4492449,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Phantom Stock","published_at":"2017-01-12T19:18:24.000Z","date":"2016-10-31","kind":"grant","acquired":true,"shares":1820.13,"price":1.15,"value":2093.1495,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."}],"balance_after":37844.59,"derivative":{"underlying":"Common Stock","underlying_shares":1820.13},"source":{"system":"sec-edgar","filing":"0001437749-17-000616","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":20,"url":"https://www.sec.gov/Archives/edgar/data/1030749/000143774917000616/rdgdoc.xml","form_type":"5"}},{"id":4492448,"issuer":{"id":162347,"kind":"organization","name":"GULFMARK OFFSHORE INC","symbol":"GLF"},"owners":[{"id":23568,"kind":"person","name":"Rubio Samuel R","position":1,"cik":"0001452077","reported_name":"Rubio Samuel R","relationship":{"officer":true,"officer_title":"SVP - Controller & CAO"}}],"security":"Phantom Stock","published_at":"2017-01-12T19:18:24.000Z","date":"2016-10-14","kind":"grant","acquired":true,"shares":1395.43,"price":1.5,"value":2093.145,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). A participant is 100% vested after 5 years of credited service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Phantom Stock units credited under the Company's Executive Nonqualified Excess Plan (the \"Plan\"). Participants are always 100% vested in their contributions to the Plan. Employer contributions vest according to the provision of the Plan, which is generally based on years of service (20% per year of credited service). 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