Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 20,452	$ (351)	$ 21,768	$ (2,144)
Other comprehensive income (loss), net of tax:
Unrealized foreign currency translation adjustments	133	136	184	49
Unrealized loss on sale of securities	0	0	0	(4)
Total comprehensive income (loss)	$ 20,585	$ (215)	$ 21,952	$ (2,099)