Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2012
Contingent Consideration Arrangement
Reconciliation of beginning and ending amounts related to the fair value for contingent consideration for acquisition of business, categorized as Level 3
Balance at the beginning of the period	$ 26,000
Payments	(1,000)
Change in fair value	(2,000)
Balance at the end of the period	23,000
Sanuk
Contingent consideration
Contingent consideration for acquisition of business	$ 22,400	$ 24,200
Sanuk | Contingent Consideration Arrangement
Contingent consideration
Compound annual growth rate (CAGR) (as a percent)	8.60%
Gross profit range	$ 58,000
Discount rate (as percent)	7.00%
Percentage point change to compound annual growth rate	5.00%
Effect of a five-percentage-point change to total liability	$ 2,000
Hoka | Contingent Consideration Arrangement
Contingent consideration
Contingent consideration for acquisition of business		1,500
Maximum contingent consideration payments			$ 2,000
Contingent consideration arrangements amount paid	1,400
Accrued Expenses
Reconciliation of fair value for acquisition of business, categorized as Level 3 of valuation hierarchy
Deferred compensation, current	398	540
Accrued Expenses | Hoka | Contingent Consideration Arrangement
Contingent consideration
Contingent liability, current	600
Other Noncurrent Liabilities
Reconciliation of fair value for acquisition of business, categorized as Level 3 of valuation hierarchy
Deferred compensation liability, noncurrent	$ 5,808	$ 5,041