{"transactions":[{"id":886737,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-02-25T00:07:40.000Z","date":"2026-02-21","kind":"tax_withholding","planned":false,"acquired":false,"shares":3077,"price":20.57,"value":63293.89,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents shares vested upon the third anniversary of the date of grant previously reported and are now issued and added to the reporting person's common stock holdings outright."}],"balance_after":10595,"source":{"system":"sec-edgar","filing":"0001296986-26-000002","document":"form4-02252026_120237.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/357173/000129698626000002/form4-02252026_120237.xml","form_type":"4"}},{"id":886736,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-02-25T00:07:40.000Z","date":"2026-02-17","kind":"grant","planned":false,"acquired":true,"shares":3121,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock units granted pursuant to the Old Second Bancorp, Inc. 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These shares have a three-year cliff vesting."}],"balance_after":13672,"source":{"system":"sec-edgar","filing":"0001296986-26-000002","document":"form4-02252026_120237.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000129698626000002/form4-02252026_120237.xml","form_type":"4"}},{"id":1254379,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-02-21T21:02:37.000Z","date":"2025-02-19","kind":"grant","planned":false,"acquired":true,"shares":3190,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of common stock. The reporting person was granted 3,190 restricted stock units on the date of the grant. These shares are time-based restricted stock units that vest on the third anniversary of the grant date."}],"balance_after":10551,"source":{"system":"sec-edgar","filing":"0001415889-25-005039","document":"form4-02212025_090233.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000141588925005039/form4-02212025_090233.xml","form_type":"4"}},{"id":1627111,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. 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These shares are time-based restricted stock units that vest on the third anniversary of the grant date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Included in this total are 3,773 shares held outright; 10,441 shares of Restricted Stock Units and 78,807 shares held with a broker."}],"balance_after":93021,"source":{"system":"sec-edgar","filing":"0001415889-24-004865","document":"form4-02222024_100217.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000141588924004865/form4-02222024_100217.xml","form_type":"4"}},{"id":1997654,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. 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These shares have a 3-year cliff vesting."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Included in this total are 1,500 shares held outright; 9,930 shares of Restricted Stock Units and 77,307 shares held with a broker."}],"balance_after":88737,"source":{"system":"sec-edgar","filing":"0001415889-23-003129","document":"form4-02232023_060229.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000141588923003129/form4-02232023_060229.xml","form_type":"4"}},{"id":2126595,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. 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Common Stock","published_at":"2022-05-19T19:52:27.000Z","date":"2022-05-18","kind":"purchase","acquired":true,"shares":4000,"price":14.18,"value":56720.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Included in this total are 65,807 shares in Mr. Finn's name held at a broker and 9,853 shares of Restricted Stock Units in Mr. Finn's name."}],"balance_after":75660,"source":{"system":"sec-edgar","filing":"0001415889-22-005311","document":"form4-05192022_120515.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000141588922005311/form4-05192022_120515.xml","form_type":"4"}},{"id":2390427,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2022-02-17T19:31:42.000Z","date":"2022-02-15","kind":"grant","acquired":true,"shares":3080,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent restricted stock units granted pursuant to the Old Second Bancorp, Inc. Long Term Incentive Plan. These shares have a three-year cliff vesting."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Included in this total are 61,807 shares held in a broker account and 9,853 shares of restricted stock units."}],"balance_after":71660,"source":{"system":"sec-edgar","filing":"0001415889-22-001493","document":"form4-02172022_110226.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000141588922001493/form4-02172022_110226.xml","form_type":"4"}},{"id":2801919,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2021-03-09T22:50:19.000Z","date":"2021-03-08","kind":"tax_withholding","acquired":false,"shares":1579,"price":13.78,"value":21758.62,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Included in this total are 56,886 shares are held in Mr. Finn's name in a brokerage account, 6,773 shares are restricted stock units and 3,421 shares are in Mr. Finn's name alone."}],"balance_after":67080,"source":{"system":"sec-edgar","filing":"0001179110-21-003152","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911021003152/edgar.xml","form_type":"4"}},{"id":2852593,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. 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These shares have a 3-year cliff vesting."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Included in this total are 54,386 shares are held in Mr. Finn's name in a brokerage account, 10,773 shares are restricted stock units and 5,000 shares are Performance Based restricted stock units."}],"balance_after":70159,"source":{"system":"sec-edgar","filing":"0001179110-21-001925","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911021001925/edgar.xml","form_type":"4"}},{"id":3265360,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. 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These shares have a 3-year cliff vesting."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Does not apply"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Included in this total are 54,386 shares are held in Mr. Finn's name in a brokerage account, 7,000 shares are restricted stock units and 5,000 shares are Performance Based restricted stock units."}],"balance_after":66386,"source":{"system":"sec-edgar","filing":"0001179110-20-001806","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911020001806/edgar.xml","form_type":"4"}},{"id":3503681,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2019-06-04T16:32:27.000Z","date":"2019-06-03","kind":"grant","acquired":true,"shares":1500,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"These shares represent Restricted Stock Units granted pursuant to the 2019 Long Term Equity Incentive Plan. These shares have a 3-year cliff vesting."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Does not apply"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Included in this total are 2,500 shares in Mr. Finn's name alone; 51,886 shares are held in Mr. Finn's name in a brokerage account, 5,500 shares are restricted stock units and 5,000 shares are Performance Based restricted stock units."}],"balance_after":64886,"source":{"system":"sec-edgar","filing":"0001179110-19-007081","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911019007081/edgar.xml","form_type":"4"}},{"id":3736844,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2018-12-11T17:23:13.000Z","date":"2018-12-10","kind":"grant","acquired":true,"shares":1500,"price":7.49,"value":11235.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"These shares represent the exercise of options."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Included in this total are 1,500 shares in Mr. Finn's name alone; 50,386 shares are held in Mr. Finn's name in a brokerage account, 6,500 shares are restricted stock units and 5,000 shares are Performance Based restricted stock units."}],"balance_after":63386,"source":{"system":"sec-edgar","filing":"0001179110-18-013662","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911018013662/edgar.xml","form_type":"4"}},{"id":3859529,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2018-07-30T18:42:27.000Z","date":"2018-07-30","kind":"grant","acquired":true,"shares":2500,"price":15.5,"value":38750.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Included in this total are 47,886 shares are held in Mr. Finn's name in a brokerage account, 9,000 shares are restricted stock units and 5,000 shares are Performance Based restricted stock units."}],"balance_after":61886,"source":{"system":"sec-edgar","filing":"0001179110-18-009988","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911018009988/edgar.xml","form_type":"4"}},{"id":3961548,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2018-04-18T21:46:23.000Z","date":"2018-04-17","kind":"grant","acquired":true,"shares":5000,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"These shares represent Performance Based Restricted Stock Units granted in 2018 under the Long Term Incentive Program. These shares have a 3-year cliff vesting."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Does not apply."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Included in this total are 45,386 shares are held in Mr. Finn's name in a brokerage account, 9,000 shares are restricted stock units and 5,000 shares are Performance Based restricted stock units."}],"balance_after":59386,"source":{"system":"sec-edgar","filing":"0001179110-18-005775","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911018005775/edgar.xml","form_type":"4"}},{"id":4042297,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2018-02-22T17:00:42.000Z","date":"2018-02-20","kind":"grant","acquired":true,"shares":1500,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"These shares represent Restricted Stock Units granted in 2018 under the Long Term Incentive Program. These shares have a 3-year cliff vesting."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Does not apply."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Of this total, 45,386 shares are held in Mr. Finn's name in a brokerage account and 9,000 shares are restricted stock units."}],"balance_after":54386,"source":{"system":"sec-edgar","filing":"0001179110-18-002567","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911018002567/edgar.xml","form_type":"4"}},{"id":4274980,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2017-06-22T19:24:13.000Z","date":"2017-06-20","kind":"other","acquired":true,"shares":2500,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"These shares are Restricted Stock Units granted in 2014 that vested in 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Does not apply."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Of this total, 45,386 shares are held in Mr. Finn's name in a brokerage account and 7,500 shares are restricted stock units."}],"balance_after":52886,"source":{"system":"sec-edgar","filing":"0001179110-17-009436","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911017009436/edgar.xml","form_type":"4"}},{"id":4339392,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2017-05-02T19:21:39.000Z","date":"2017-05-01","kind":"purchase","acquired":true,"shares":2000,"price":11.8,"value":23600.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Of this total, 42,886 shares are held in Mr. Finn's name in a brokerage account and 10,000 shares are restricted stock units."}],"balance_after":52886,"source":{"system":"sec-edgar","filing":"0001179110-17-006375","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911017006375/edgar.xml","form_type":"4"}},{"id":4433895,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2017-02-22T22:54:42.000Z","date":"2017-02-21","kind":"grant","acquired":true,"shares":2500,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"These shares represent Restricted Stock Units granted in 2017 under Old Second's Equity Award Program. These shares have a 3-year cliff vesting."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Of this total, 40,886 shares are held in Mr. Finn's name in a brokerage account and 10,000 shares are restricted stock units."}],"balance_after":50886,"source":{"system":"sec-edgar","filing":"0001179110-17-002948","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911017002948/edgar.xml","form_type":"4"}},{"id":4606243,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2016-09-12T17:03:54.000Z","date":"2016-09-08","kind":"purchase","acquired":true,"shares":2602,"price":8.29,"value":21570.58,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Of this total, 33,488 shares are held in Mr. Finn's name in a brokerage account and 7,500 shares are restricted stock units."}],"balance_after":40988,"source":{"system":"sec-edgar","filing":"0001179110-16-029543","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911016029543/edgar.xml","form_type":"4"}},{"id":4606242,"issuer":{"id":2238,"kind":"organization","name":"OLD SECOND BANCORP INC","symbol":"OSBC"},"owners":[{"id":65077,"kind":"person","name":"Finn Barry","position":1,"cik":"0001296986","reported_name":"Finn Barry","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Old Second Bancorp, Inc. Common Stock","published_at":"2016-09-12T17:03:54.000Z","date":"2016-09-09","kind":"purchase","acquired":true,"shares":7398,"price":8.2658,"value":61150.3884,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Of this total, 40,886 shares are held in Mr. Finn's name in a brokerage account and 7,500 shares are restricted stock units."}],"balance_after":48386,"source":{"system":"sec-edgar","filing":"0001179110-16-029543","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/357173/000117911016029543/edgar.xml","form_type":"4"}}]}