Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2010
Sales Return Reserves [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 6,506	$ 2,229		$ 1,726
Additions Charged to Costs and Expenses	17,966	10,783	2,732
Deductions	13,942	6,506	2,229
Balance at End of Year	10,530	6,506	2,229	1,726
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	11,823	8,481		6,717
Additions Charged to Costs and Expenses	1,467	6,885	5,715
Deductions	6,995	3,543	3,951
Balance at End of Year	6,295	11,823	8,481	6,717
Valuation Allowance on Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	2,003	1,446		1,102
Additions Charged to Costs and Expenses	285	557	344
Deductions	0	0	0
Balance at End of Year	$ 2,288	$ 2,003	$ 1,446	$ 1,102