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WARRANTY LIABILITY (Tables)
 6 Months Ended
Mar. 31, 2017
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability
Changes in Griffon’s warranty liability, included in Accrued liabilities, were as follows:
 
Three Months Ended March 31,
 
Six Months Ended March 31,
 
2017
 
2016
 
2017
 
2016
Balance, beginning of period
$
6,015

 
$
6,062

 
$
6,322

 
$
6,040

Warranties issued and changes in estimated pre-existing warranties
1,213

 
1,506

 
2,507

 
3,008

Actual warranty costs incurred
(1,425
)
 
(1,099
)
 
(3,026
)
 
(2,579
)
Balance, end of period
$
5,803

 
$
6,469

 
$
5,803

 
$
6,469