Certain Financial Statement Information Other Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Mar. 31, 2013
Schedule of other assets
Non-current portion of prepaid expenses	$ 4,842	$ 7,866
Strategic investments	3,000	3,000
Total other assets	$ 7,842	$ 10,866	[1]

[1] Amounts have been derived from the March 31, 2013 audited consolidated financial statements.