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Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. 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Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. 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Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. 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Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."}],"balance_after":20108,"derivative":{"underlying":"Common units representing limited partner interests","underlying_shares":358},"source":{"system":"sec-edgar","filing":"0001209191-18-024435","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919118024435/doc4.xml","form_type":"4"}},{"id":3966778,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Subordinated units representing limited partner interests","published_at":"2018-04-09T23:29:17.000Z","date":"2018-04-05","kind":"exercise","acquired":true,"shares":119,"ownership":{"direct":false,"nature":"By daughter"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."}],"balance_after":4333,"derivative":{"underlying":"Common units representing limited partner interests","underlying_shares":119},"source":{"system":"sec-edgar","filing":"0001209191-18-024435","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919118024435/doc4.xml","form_type":"4"}},{"id":3966777,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Subordinated units representing limited partner interests","published_at":"2018-04-09T23:29:17.000Z","date":"2018-04-05","kind":"exercise","acquired":true,"shares":119,"ownership":{"direct":false,"nature":"By son"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."}],"balance_after":4333,"derivative":{"underlying":"Common units representing limited partner interests","underlying_shares":119},"source":{"system":"sec-edgar","filing":"0001209191-18-024435","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919118024435/doc4.xml","form_type":"4"}},{"id":3966776,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Subordinated units representing limited partner interests","published_at":"2018-04-09T23:29:17.000Z","date":"2018-04-05","kind":"exercise","acquired":true,"shares":199,"ownership":{"direct":false,"nature":"By wife"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."}],"balance_after":3827,"derivative":{"underlying":"Common units representing limited partner interests","underlying_shares":199},"source":{"system":"sec-edgar","filing":"0001209191-18-024435","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919118024435/doc4.xml","form_type":"4"}},{"id":3966775,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common units representing limited partner interests","published_at":"2018-04-09T23:29:17.000Z","date":"2018-04-05","kind":"exercise","acquired":true,"shares":273,"ownership":{"direct":false,"nature":"By Donald Mark DeWalch Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. 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Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. 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Each Series A Preferred Unit converted into 30.3431 Common Units and 39.7427 Subordinated Units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the Series A Preferred Units automatically converted into Common Units and Subordinated Units under the terms of the Limited Partnership Agreement. 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Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."}],"balance_after":9,"derivative":{"underlying":"Common and subordinated units representing LP interests"},"source":{"system":"sec-edgar","filing":"0001209191-17-029053","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919117029053/doc4.xml","form_type":"4"}},{"id":4340190,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Preferred units representing limited partner interests","published_at":"2017-05-02T01:18:40.000Z","date":"2017-04-28","kind":"exercise","acquired":false,"shares":2,"ownership":{"direct":false,"nature":"By daughter"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."}],"balance_after":3,"derivative":{"underlying":"Common and subordinated units representing LP interests"},"source":{"system":"sec-edgar","filing":"0001209191-17-029053","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919117029053/doc4.xml","form_type":"4"}},{"id":4340189,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Preferred units representing limited partner interests","published_at":"2017-05-02T01:18:40.000Z","date":"2017-04-28","kind":"exercise","acquired":false,"shares":2,"ownership":{"direct":false,"nature":"By son"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."}],"balance_after":3,"derivative":{"underlying":"Common and subordinated units representing LP interests"},"source":{"system":"sec-edgar","filing":"0001209191-17-029053","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919117029053/doc4.xml","form_type":"4"}},{"id":4340188,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Preferred units representing limited partner interests","published_at":"2017-05-02T01:18:40.000Z","date":"2017-04-28","kind":"exercise","acquired":false,"shares":5,"ownership":{"direct":false,"nature":"By wife"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each preferred unit may be converted at any time at the option of the holder thereof into common units at the then-effective conversion rate. In addition, each year from 2016 to 2018 a number of preferred units will automatically convert into common units and subordinated units at the then-effective conversion rate unless redeemed, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. 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Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."}],"balance_after":19750,"derivative":{"underlying":"Common units representing limited partner interests","underlying_shares":318},"source":{"system":"sec-edgar","filing":"0001209191-17-029053","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919117029053/doc4.xml","form_type":"4"}},{"id":4340186,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Subordinated units representing limited partner interests","published_at":"2017-05-02T01:18:40.000Z","date":"2017-04-28","kind":"exercise","acquired":true,"shares":79,"ownership":{"direct":false,"nature":"By daughter"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."}],"balance_after":4214,"derivative":{"underlying":"Common units representing limited partner interests","underlying_shares":79},"source":{"system":"sec-edgar","filing":"0001209191-17-029053","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919117029053/doc4.xml","form_type":"4"}},{"id":4340185,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Subordinated units representing limited partner interests","published_at":"2017-05-02T01:18:40.000Z","date":"2017-04-28","kind":"exercise","acquired":true,"shares":79,"ownership":{"direct":false,"nature":"By son"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."}],"balance_after":4214,"derivative":{"underlying":"Common units representing limited partner interests","underlying_shares":79},"source":{"system":"sec-edgar","filing":"0001209191-17-029053","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919117029053/doc4.xml","form_type":"4"}},{"id":4340184,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Subordinated units representing limited partner interests","published_at":"2017-05-02T01:18:40.000Z","date":"2017-04-28","kind":"exercise","acquired":true,"shares":199,"ownership":{"direct":false,"nature":"By wife"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each subordinated unit will convert into one common unit representing a limited partner interest in the Issuer at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-202875)."}],"balance_after":3628,"derivative":{"underlying":"Common units representing limited partner interests","underlying_shares":199},"source":{"system":"sec-edgar","filing":"0001209191-17-029053","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1621434/000120919117029053/doc4.xml","form_type":"4"}},{"id":4340183,"issuer":{"id":4198,"kind":"organization","name":"Black Stone Minerals, L.P.","symbol":"BSM"},"owners":[{"id":32637,"kind":"person","name":"DeWalch D Mark","position":1,"cik":"0001638259","reported_name":"DeWalch D Mark","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common units representing limited partner interests","published_at":"2017-05-02T01:18:40.000Z","date":"2017-04-28","kind":"exercise","acquired":true,"shares":243,"ownership":{"direct":false,"nature":"By Donald Mark DeWalch Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. 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Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. 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Each preferred unit converted into 30.3431 common units and 39.7427 subordinated units."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"A portion of the preferred units automatically converted into common units and subordinated units under the terms of the Partnership's Limited Partnership Agreement. 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