Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Commitments and Contingencies
Future commitments under purchase orders and other agreements in next year	$ 915,465
Long-term Purchase Commitment, Amount	$ 14,000
Maximum indemnity period of claims for intellectual property (in years)	5 years
Sanuk
Commitments and Contingencies
Business Combination, Contingent Consideration, Liability	$ 19,700
Hoka
Commitments and Contingencies
Maximum contingent consideration payments	2,000
Approximate amount paid	1,700
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	300
Purchase commitment
Commitments and Contingencies
Advance deposits	20,000	$ 14,000
Outstanding purchase orders with manufacturers
Commitments and Contingencies
Outstanding purchase orders with manufacturers	$ 957,887
Gross profit performance criteria | Sanuk
Commitments and Contingencies
Business Acquisition Purchase Price, Additional Participation Payment Year Three Percentage of Gross Profit	40.00%