Concentration of Business, Significant Customers and Credit Risk (Details) $ in Thousands			3 Months Ended		9 Months Ended
	Dec. 31, 2015 USD ($) tannery	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($) tannery	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) tannery	Dec. 31, 2014 USD ($)	Mar. 31, 2014 USD ($)
Concentration of Business, Significant Customers and Credit Risk [Line Items]
Property and equipment, net	$ 245,400	$ 232,317	$ 245,400		$ 245,400
Number of tanneries | tannery	2		2		2
Money market fund accounts	$ 182,167	127,900	$ 182,167		$ 182,167
Cash	80,842	97,243	80,842		80,842
Total cash and cash equivalents	$ 263,009	$ 225,143	$ 263,009	$ 369,442	$ 263,009	$ 369,442	$ 245,088
International net sales
Concentration of Business, Significant Customers and Credit Risk [Line Items]
Concentration risk (as a percent)			31.70%	32.90%	34.60%	35.80%
Concentration risk benchmark (as a percent)					10.00%
Long-lived assets
Concentration of Business, Significant Customers and Credit Risk [Line Items]
Concentration risk (as a percent)					10.00%
Customer One | Net trade accounts receivable
Concentration of Business, Significant Customers and Credit Risk [Line Items]
Concentration risk (as a percent)	22.90%	11.00%
Customer Two | Net trade accounts receivable
Concentration of Business, Significant Customers and Credit Risk [Line Items]
Concentration risk (as a percent)		11.80%
US
Concentration of Business, Significant Customers and Credit Risk [Line Items]
Property and equipment, net	$ 213,422	$ 196,513	$ 213,422		$ 213,422
All other countries
Concentration of Business, Significant Customers and Credit Risk [Line Items]
Property and equipment, net	$ 31,978	$ 35,804	$ 31,978		$ 31,978