Commitments and Contingencies (Narrative) (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2015 USD ($) claim	Mar. 31, 2015 USD ($)	Sep. 30, 2012 USD ($)
Commitments and Contingencies
Participation payment terms	60 days
Maximum indemnity period of claims for intellectual property	5 years
Indemnification
Commitments and Contingencies
Number of pending claims | claim	0
Future capital expenditures
Commitments and Contingencies
Material commitments	$ 5,000
Sanuk
Commitments and Contingencies
Contingent consideration for acquisition of business	$ 22,400	$ 24,200
Gross profit performance criteria | Sanuk
Commitments and Contingencies
Contingent consideration performance percentage applied to gross profit	40.00%
Contingent Consideration Arrangement | Hoka
Commitments and Contingencies
Contingent consideration for acquisition of business		$ 1,500
Maximum contingent consideration payments			$ 2,000
Contingent consideration arrangements amount paid	$ 1,400
Accounts Payable and Accrued Liabilities | Contingent Consideration Arrangement | Hoka
Commitments and Contingencies
Contingent liability, current	$ 600