RESTRUCTURING CHARGES - Summary of the Restructuring and Other Related Charges (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 6,434
Personnel related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,134
Facilities, exit costs and other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	140
Non-cash facility and other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4,160
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,723
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3,711