BUSINESS SEGMENTS (Details) - Summary of Reconciliation of Segment Profit Before Taxes and Operations - USD ($)	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Nov. 16, 2017	Sep. 05, 2017
Home & Building Products:
Revenue	$ 437,303,000	$ 352,277,000
Segment operating profit:
Segment operating profit	15,037,000	17,860,000
Net interest expense	(16,642,000)	(13,289,000)
Unallocated amounts	(10,436,000)	(10,311,000)
Cost of life insurance benefit	13,715,000	0
Income (loss) before taxes from continuing operations	(2,073,000)	4,431,000
Segment adjusted EBITDA:
Segment adjusted EBITDA	43,656,000	39,915,000
Net interest expense	(16,642,000)	(13,289,000)
Segment depreciation and amortization	(12,958,000)	(11,988,000)
Unallocated amounts	(10,436,000)	(10,311,000)
Acquisition costs	(3,185,000)	0
Cost of life insurance benefit	13,715,000	0
Segment:
Capital expenditures	10,785,000	7,690,000
Ames True Temper Inc [Member]
Home & Building Products:
Revenue	139,982,000	120,724,000
Clopay Building Products [Member]
Home & Building Products:
Revenue	154,236,000	143,460,000
ClosetMaid LLC [Member]
Home & Building Products:
Revenue	76,760,000	0
Home And Building Products [Member]
Home & Building Products:
Revenue	370,978,000	264,184,000
Segment adjusted EBITDA:
Segment adjusted EBITDA	39,457,000	31,807,000
Segment depreciation and amortization	(10,133,000)	(9,167,000)
Segment:
Capital expenditures	6,658,000	6,391,000
Telephonics [Member]
Home & Building Products:
Revenue	66,325,000	88,093,000
Segment adjusted EBITDA:
Segment adjusted EBITDA	4,199,000	8,108,000
Segment depreciation and amortization	(2,719,000)	(2,717,000)
Segment:
Capital expenditures	1,943,000	1,296,000
Operating Segments [Member]
Segment adjusted EBITDA:
Segment depreciation and amortization	(12,852,000)	(11,884,000)
Segment:
Capital expenditures	8,601,000	7,687,000
Corporate, Non-Segment [Member]
Segment adjusted EBITDA:
Segment depreciation and amortization	(106,000)	(104,000)
Segment:
Capital expenditures	2,184,000	3,000
Discontinued Operations, Held-for-sale [Member] | Plastics [Member]
Segment Reporting Information [Line Items]
Consideration			$ 475,000,000	$ 475,000,000
Continuing Operations [Member]
Segment operating profit:
Segment operating profit from continuing operations	29,231,000	28,031,000
Net interest expense	(16,642,000)	(13,289,000)
Unallocated amounts	(10,436,000)	(10,311,000)
Acquisition costs	(1,612,000)	0
Income (loss) before taxes from continuing operations	(2,073,000)	4,431,000
Segment adjusted EBITDA:
Net interest expense	(16,642,000)	(13,289,000)
Unallocated amounts	(10,436,000)	(10,311,000)
Continuing Operations [Member] | Home And Building Products [Member]
Segment operating profit:
Segment operating profit	27,751,000	22,640,000
Continuing Operations [Member] | Telephonics [Member]
Segment operating profit:
Segment operating profit	1,480,000	5,391,000
Postretirement Life Insurance [Member] | Continuing Operations [Member]
Segment operating profit:
Cost of life insurance benefit	(2,614,000)	0
Segment adjusted EBITDA:
Cost of life insurance benefit	(2,614,000)	$ 0
ClosetMaid LLC [Member]
Segment Reporting Information [Line Items]
Income from operations before taxes	$ 677,575