Certain Financial Statement Information - Schedule of Other assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2012
Schedule of other assets
Non-current portion of prepaid expenses	$ 4,235		$ 7,866
Strategic investments	3,000	[1]	3,000	[1]
Other	519		0
Total other assets	7,754		10,866
Impairment charge on non-marketable strategic investments	$ 0		$ 2,250		$ 1,000

[1] During the fiscal years ended March 31, 2014 and 2013, the Company recognized an impairment charge on its non-marketable strategic investment of $0.0 million and $2.3 million, respectively. Refer to Note 2, Investments, to the Consolidated Financial Statements for details.