REPORTABLE SEGMENTS REPORTABLE SEGMENTS (Details) - Schedule of Disaggregated Revenue by Geographic Region $ in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 CAD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2018 CAD ($)	Sep. 30, 2017 USD ($)
Segment Reporting Information [Line Items]
Revenue	$ 2,209,289	$ 3,500	$ 1,977,918	$ 700	$ 1,524,997
Consumer And Professional Products Segment [Member]
Segment Reporting Information [Line Items]
Revenue	1,000,608
Home and Building Products (HBP) [Member]
Segment Reporting Information [Line Items]
Revenue	873,640
Defense Electronics Segment [Member]
Segment Reporting Information [Line Items]
Revenue	335,041
UNITED STATES
Segment Reporting Information [Line Items]
Revenue	1,737,263
UNITED STATES | Consumer And Professional Products Segment [Member]
Segment Reporting Information [Line Items]
Revenue	690,772
UNITED STATES | Home and Building Products (HBP) [Member]
Segment Reporting Information [Line Items]
Revenue	820,396
UNITED STATES | Defense Electronics Segment [Member]
Segment Reporting Information [Line Items]
Revenue	226,095
Europe [Member]
Segment Reporting Information [Line Items]
Revenue	100,308
Europe [Member] | Consumer And Professional Products Segment [Member]
Segment Reporting Information [Line Items]
Revenue	63,284
Europe [Member] | Home and Building Products (HBP) [Member]
Segment Reporting Information [Line Items]
Revenue	109
Europe [Member] | Defense Electronics Segment [Member]
Segment Reporting Information [Line Items]
Revenue	36,915
CANADA
Segment Reporting Information [Line Items]
Revenue	122,367
CANADA | Consumer And Professional Products Segment [Member]
Segment Reporting Information [Line Items]
Revenue	72,327
CANADA | Home and Building Products (HBP) [Member]
Segment Reporting Information [Line Items]
Revenue	39,472
CANADA | Defense Electronics Segment [Member]
Segment Reporting Information [Line Items]
Revenue	10,568
AUSTRALIA
Segment Reporting Information [Line Items]
Revenue	169,019
AUSTRALIA | Consumer And Professional Products Segment [Member]
Segment Reporting Information [Line Items]
Revenue	165,291
AUSTRALIA | Home and Building Products (HBP) [Member]
Segment Reporting Information [Line Items]
Revenue	16
AUSTRALIA | Defense Electronics Segment [Member]
Segment Reporting Information [Line Items]
Revenue	3,712
All Other Countries [Member]
Segment Reporting Information [Line Items]
Revenue	80,332
All Other Countries [Member] | Consumer And Professional Products Segment [Member]
Segment Reporting Information [Line Items]
Revenue	8,934
All Other Countries [Member] | Home and Building Products (HBP) [Member]
Segment Reporting Information [Line Items]
Revenue	13,647
All Other Countries [Member] | Defense Electronics Segment [Member]
Segment Reporting Information [Line Items]
Revenue	$ 57,751