General - Schedule of Restructuring Costs (Details) - USD ($) $ in Thousands	11 Months Ended	12 Months Ended			38 Months Ended
	Mar. 31, 2016	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring charges		$ 295	$ 1,667	$ 28,984
Fiscal Year 2016 Restructuring Plan
Restructuring Reserve [Roll Forward]
Beginning balance restructuring reserve		4,728	11,080	12,874
Restructuring charges	$ 24,673	295	1,667	28,984	$ 55,619
Paid in cash		(2,437)	(8,019)	(23,714)
Non-cash				(7,064)
Ending balance restructuring reserve	12,874	2,586	4,728	11,080	2,586
Lease Termination | Fiscal Year 2016 Restructuring Plan
Restructuring Reserve [Roll Forward]
Beginning balance restructuring reserve		3,645	4,572	7,629
Restructuring charges		295	149	8,986
Paid in cash		(1,856)	(1,076)	(12,043)
Non-cash				0
Ending balance restructuring reserve	7,629	2,084	3,645	4,572	2,084
Retail Store Fixed Asset Impairment | Fiscal Year 2016 Restructuring Plan
Restructuring Reserve [Roll Forward]
Beginning balance restructuring reserve		0	0	0
Restructuring charges		0	0	3,614
Paid in cash		0	0	0
Non-cash				(3,614)
Ending balance restructuring reserve	0	0	0	0	0
Severance Costs | Fiscal Year 2016 Restructuring Plan
Restructuring Reserve [Roll Forward]
Beginning balance restructuring reserve		0	2,555	3,436
Restructuring charges		0	0	5,773
Paid in cash		0	(2,555)	(6,403)
Non-cash				(251)
Ending balance restructuring reserve	3,436	0	0	2,555	0
Software and Office Fixed Asset Impairment | Fiscal Year 2016 Restructuring Plan
Restructuring Reserve [Roll Forward]
Beginning balance restructuring reserve		0	0	0
Restructuring charges		0	0	3,199
Paid in cash		0	0	0
Non-cash				(3,199)
Ending balance restructuring reserve	0	0	0	0	0
Other | Fiscal Year 2016 Restructuring Plan
Restructuring Reserve [Roll Forward]
Beginning balance restructuring reserve		1,083	3,953	1,809
Restructuring charges		0	1,518	7,412
Paid in cash		(581)	(4,388)	(5,268)
Non-cash				0
Ending balance restructuring reserve	$ 1,809	$ 502	$ 1,083	$ 3,953	$ 502