CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION - Narrative (Details)	3 Months Ended
Dec. 31, 2019
Investment [Line Items]
Maximum percentage of segment adjusted EBITDA to business EBITDA	50.00%
Clopay Corporation, Telephonics Corporation, The AMES Companies, Inc., ATT Southern LLC, Clopay Ames Holding Corp., ClosetMaid, LLC, CornellCookson, LLC and Cornell Real Estate Holdings, LLC
Investment [Line Items]
Noncontrolling interest, ownership percentage by parent	100.00%

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant