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General - New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Apr. 01, 2018	Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 695,580		$ 785,871
Inventory reserves			11,251
Difference between Revenue Guidance in Effect before and after Topic 606 \| Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ 1,000
Other Current Assets \| Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Inventory portion of the sales return reserve	4,819
Wholesale \| Other Accrued Expenses \| Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for sales returns included in other accrued expenses	$ 9,816
Sales Returns and Allowances \| Wholesale
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Allowances			$ 20,848