Restructuring (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($) store	Sep. 30, 2015 USD ($)	Mar. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of Stores | store	10
Restructuring costs	$ 2,632	$ 0
Brand Realignment
Restructuring Cost and Reserve [Line Items]
Number of Stores | store	24
Restructuring costs	$ 27,400		$ 24,800
Restructuring and related cost, expected cost	3,600
Minimum | Brand Realignment
Restructuring Cost and Reserve [Line Items]
Restructuring costs	7,000
Maximum | Brand Realignment
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 12,000