CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION - Narrative (Details)	9 Months Ended
Jun. 30, 2020
Condensed Financial Statements, Captions [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
Condensed Financial Statements, Captions [Line Items]
Noncontrolling interest, ownership percentage by parent	100.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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