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This stock appreciation right is required to be settled in stock at the time of exercise."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"This stock appreciation right, which was granted under the 2023 Plan, becomes vested and exercisable in three equal annual installments on October 31, 2025, October 31, 2026 and October 31, 2027. This stock appreciation right is required to be settled in stock at the time of exercise."}],"balance_after":6807,"derivative":{"exercise_price":192.83,"expiration_date":"2034-11-19","underlying":"Common Stock ($0.10 par value)","underlying_shares":6807},"source":{"system":"sec-edgar","filing":"0000950170-24-130129","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/717954/000095017024130129/ownership.xml","form_type":"4"}},{"id":1355302,"issuer":{"id":3907,"kind":"organization","name":"UNIFIRST CORP"},"owners":[{"id":71246,"kind":"person","name":"Sintros Steven S","position":1,"cik":"0001453910","reported_name":"Sintros Steven S","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-11-22T20:05:55.000Z","date":"2024-11-19","kind":"grant","planned":true,"acquired":true,"shares":4668,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F7","text":"Represents restricted stock units granted under the UniFirst Corporation 2023 Stock Option and Incentive Plan (the \"2023 Plan\"). Such restricted stock units vest in three equal annual installments on October 31, 2025, October 31, 2026 and October 31, 2027."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F8","text":"Consists of (i) 16,081 shares of Common Stock owned by the reporting person, (iii) 645 restricted stock units that will vest in one remaining annual installment on November 19, 2025, (iv) 1,493 restricted stock units that vest in two remaining equal annual installments on October 31, 2025 and October 31, 2026, (v) 2,363 restricted stock units that vest in three remaining equal annual installments on October 31, 2025, October 31, 2026 and October 31, 2027, (vi) 3,650 restricted stock units that vest in four equal annual installments on October 31, 2025, October 31, 2026, October 31, 2027 and October 31, 2028 and (vii) 4,668 restricted stock units that vest in three equal annual installments on October 31, 2025, October 31, 2026 and October 31, 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The shares were sold in multiple transactions at prices ranging from $194.31 to $194.50, inclusive. The reporting person undertakes to provide to UniFirst Corporation, any security holder of\nUniFirst Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range."}],"balance_after":22571,"source":{"system":"sec-edgar","filing":"0000950170-24-130129","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/717954/000095017024130129/ownership.xml","form_type":"4"}},{"id":1355297,"issuer":{"id":3907,"kind":"organization","name":"UNIFIRST CORP"},"owners":[{"id":71246,"kind":"person","name":"Sintros Steven S","position":1,"cik":"0001453910","reported_name":"Sintros Steven S","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-11-22T20:05:55.000Z","date":"2024-11-19","kind":"sale","planned":true,"acquired":false,"shares":1322,"price":193.52,"value":255833.44,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares sold pursuant to a trading plan intended to comply with Rule 10b5-1(c) and adopted on August 16, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $193.10 to $194.00, inclusive. The reporting person undertakes to provide to UniFirst Corporation, any security holder of\nUniFirst Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range."}],"balance_after":22685,"source":{"system":"sec-edgar","filing":"0000950170-24-130129","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/717954/000095017024130129/ownership.xml","form_type":"4"}},{"id":1355296,"issuer":{"id":3907,"kind":"organization","name":"UNIFIRST CORP"},"owners":[{"id":71246,"kind":"person","name":"Sintros Steven S","position":1,"cik":"0001453910","reported_name":"Sintros Steven S","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-11-22T20:05:55.000Z","date":"2024-11-19","kind":"sale","planned":true,"acquired":false,"shares":1771,"price":192.6,"value":341094.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares sold pursuant to a trading plan intended to comply with Rule 10b5-1(c) and adopted on August 16, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $192.06 to $192.95, inclusive. The reporting person undertakes to provide to UniFirst Corporation, any security holder of\nUniFirst Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range."}],"balance_after":24007,"source":{"system":"sec-edgar","filing":"0000950170-24-130129","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/717954/000095017024130129/ownership.xml","form_type":"4"}},{"id":1377794,"issuer":{"id":3907,"kind":"organization","name":"UNIFIRST CORP"},"owners":[{"id":71246,"kind":"person","name":"Sintros Steven S","position":1,"cik":"0001453910","reported_name":"Sintros Steven S","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common 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