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WARRANTY LIABILITY (Tables)
6 Months Ended
Mar. 31, 2024
Product Warranties Disclosures [Abstract]  
Schedule of Changes in Warranty Liability, Included in Accrued Liabilities
Changes in Griffon’s warranty liability in accrued liabilities for the three and six months ended March 31, 2024 and 2023 were as follows:
 Three Months Ended March 31,Six Months Ended March 31,
 2024202320242023
Balance, beginning of period$15,461 $17,699 $20,781 $16,786 
Warranties issued and changes in estimated pre-existing warranties9,104 6,413 10,044 11,080 
Actual warranty costs incurred(9,662)(4,011)(15,922)(7,765)
Balance, end of period$14,903 $20,101 $14,903 $20,101