Restructuring (Details) $ in Thousands	3 Months Ended		6 Months Ended		20 Months Ended
	Sep. 30, 2017 USD ($) store	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) store	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) store	Mar. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0		$ 1,518	$ 2,632
Brand Realignment
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	$ 900	1,518	$ 2,632	$ 55,308
Restructuring reserve	$ 5,850		$ 5,850		$ 5,850	$ 11,080
Brand Realignment | Facility Closing
Restructuring Cost and Reserve [Line Items]
Number of stores closed | store	26		26		26
Short Term Liabilities | Brand Realignment
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 1,638		$ 1,638		$ 1,638
Long Term Liabilities | Brand Realignment
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 4,212		$ 4,212		$ 4,212