REPORTABLE SEGMENTS REPORTABLE SEGMENTS (Details) - Schedule of disaggregated revenue by geographic region - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Revenue	$ 660,673	$ 632,061	$ 566,350	$ 548,438	$ 574,164	$ 574,970	$ 549,633	$ 510,522	$ 2,407,522	$ 2,209,289	$ 1,977,918
Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue									1,139,233	1,000,608	953,612
Home and Building Products (HBP)
Segment Reporting Information [Line Items]
Revenue									927,313	873,640	697,969
Defense Electronics
Segment Reporting Information [Line Items]
Revenue									340,976	335,041	$ 326,337
United States
Segment Reporting Information [Line Items]
Revenue									1,880,597	1,737,263
United States | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue									769,100	690,772
United States | Home and Building Products (HBP)
Segment Reporting Information [Line Items]
Revenue									877,115	820,396
United States | Defense Electronics
Segment Reporting Information [Line Items]
Revenue									234,382	226,095
Europe
Segment Reporting Information [Line Items]
Revenue									123,822	100,308
Europe | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue									85,339	63,284
Europe | Home and Building Products (HBP)
Segment Reporting Information [Line Items]
Revenue									130	109
Europe | Defense Electronics
Segment Reporting Information [Line Items]
Revenue									38,353	36,915
Canada
Segment Reporting Information [Line Items]
Revenue									124,777	122,367
Canada | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue									74,072	72,327
Canada | Home and Building Products (HBP)
Segment Reporting Information [Line Items]
Revenue									38,662	39,472
Canada | Defense Electronics
Segment Reporting Information [Line Items]
Revenue									12,043	10,568
Australia
Segment Reporting Information [Line Items]
Revenue									204,894	169,019
Australia | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue									203,012	165,291
Australia | Home and Building Products (HBP)
Segment Reporting Information [Line Items]
Revenue									0	16
Australia | Defense Electronics
Segment Reporting Information [Line Items]
Revenue									1,882	3,712
Consolidated revenue
Segment Reporting Information [Line Items]
Revenue									73,432	80,332
Consolidated revenue | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue									7,710	8,934
Consolidated revenue | Home and Building Products (HBP)
Segment Reporting Information [Line Items]
Revenue									11,406	13,647
Consolidated revenue | Defense Electronics
Segment Reporting Information [Line Items]
Revenue									$ 54,316	$ 57,751