RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) position
Restructuring Cost and Reserve [Line Items]
Restructuring charges, pre-tax	$ 1,633			$ 11,171
Restructuring costs				6,479
Non-cash charges		$ 532	$ 4,160	4,692
Impairment charge, operating lease				1,968
Impairment charge, leasehold improvements				671
Inventory write down				304
Impairment charge, manufacturing assets				$ 1,749
Reduction of headcount | position				179
One-time charges
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	35,000			$ 35,000
Capital investments
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	40,000			40,000
Cash charges
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	16,000			16,000
Personnel related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	12,000			12,000
Restructuring charges, pre-tax	1,050			4,842
Restructuring costs				4,842
Non-cash charges		0	0
Facilities, exit costs and other
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	4,000			4,000
Restructuring charges, pre-tax	583			1,637
Restructuring costs				1,637
Non-cash charges		$ 0	$ 0
Asset write-downs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	$ 19,000			$ 19,000