CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) (USD $)	3 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (13,065,000)		$ 10,857,000
Other comprehensive loss, net of tax:
Unrealized gain (loss) on investments	467,000	[1]	(4,529,000)	[1]
Loss on foreign currency translation	(88,000)		(189,000)
Other comprehensive loss, net of tax	379,000		(4,718,000)
Total comprehensive (loss) income	(12,686,000)		6,139,000
Reclassification adjustment from AOCI to earnings, short term investments	$ 0		$ (3,200,000)

[1] The amounts reclassified from accumulated other comprehensive (loss) income and recorded in interest income (expense), net in the Condensed Consolidated Statement of Operations relating to short term investments were zero and $3.2 million for three months ended June 30, 2014 and 2013, respectively. Refer to Note 2, Certain Financial Statement Information, to the Condensed Consolidated Financial Statements for additional details.