Business Segments, Concentration of Business, and Credit Risk and Significant Customers (Long-lived Assets) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		3 Months Ended			9 Months Ended	3 Months Ended
	Dec. 31, 2014		Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2013	Mar. 31, 2014		Sep. 30, 2013	Mar. 31, 2013
Business segment information
Number of Stores	7		7
Property and equipment, by major country	216,055		216,055				184,570
Number of Customers Considered Concentration Risk	1		1				1
Number of Tanneries	2		2
Cash and cash equivalents
Money market fund accounts	203,339		203,339				143,816
Cash	166,103		166,103				101,272
Total Cash and Cash Equivalents	369,442		369,442				245,088		237,125	64,591
Long-lived Assets
Business segment information
Concentration risk (as a percent)	10.00%
International Net Sales
Business segment information
Concentration risk (as a percent)	35.80%		32.90%		30.60%	33.50%
Concentration risk benchmark (as a percent)	10.00%
Net Trade Accounts Receivable
Business segment information
Concentration risk benchmark (as a percent)			10.00%
Net Trade Accounts Receivable | Customer One
Business segment information
Concentration risk (as a percent)	20.30%						11.80%
Net Trade Accounts Receivable | Customer Two
Business segment information
Concentration risk (as a percent)							11.40%
US
Business segment information
Property and equipment, by major country	180,484		180,484				148,178
All other countries
Business segment information
Property and equipment, by major country	35,571	[1]	35,571	[1]			36,392	[1]

[1] No other country’s long-lived assets comprised more than 10% of total long-lived assets as of December 31, 2014 and March 31, 2014.