Restructuring and Other Costs, Net - Schedule of Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 7,554	$ 3,127
Personnel
Restructuring Cost and Reserve [Line Items]
Restructuring charges	360	(663)
Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring charges		2,055
Spin-Off
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 7,194	$ 1,735