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WARRANTY LIABILITY (Tables)
 12 Months Ended
Sep. 30, 2016
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability
Changes in Griffon’s warranty liability, included in Accrued liabilities, were as follows:
 
Years Ended September 30,
 
2016
 
2015
Balance, beginning of period
$
6,040

 
$
6,044

Warranties issued and changes in estimated pre-existing warranties
6,501

 
7,959

Actual warranty costs incurred
(6,219
)
 
(7,963
)
Balance, end of period
$
6,322

 
$
6,040