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DISCONTINUED OPERATIONS - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Feb. 06, 2018
Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Claims dispute settlement related to PPC divestiture   $ 11,000,000          
Claims dispute settlement related to PPC divestiture, net of tax   $ 7,646,000          
Payment of claims dispute settlement $ 9,500,000            
PPC and Installation Services and other discontinued activities | Discontinued Operations [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Liabilities held for sale $ 4,948,000     $ 4,948,000      
PPC [Member] | Discontinued Operations, Disposed of by Sale [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Consideration           $ 475,000,000  
Consideration after sale adjustments           $ 465,000,000  
Gain on sale of business     $ 0   $ 117,625,000    
Gain on sale of business net of tax         86,357,000    
Revenue     $ 0   166,262,000    
Installation Services [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Revenue       $ 0 $ 0    
Clopay Services Corporation [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Environmental exit costs, costs accrued to date             $ 5,700,000