Statements of Stockholders' Equity and Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance at Mar. 31, 2009	$ 120	$ 200,293	$ 2,964	$ 207,503		$ 410,880
Balance (in Shares) at Mar. 31, 2009	12,071
Sale of common stock under employee option plans	1	447				448
Sale of common stock under employee option plans (in Shares)	18
Net issuance of restricted shares (in Shares)	62
Net settlement of restricted shares	(1)	(1,572)				(1,573)
Net settlement of restricted shares (in Shares)	(40)
Stock-based compensation		5,816				5,816
Repurchase of common stock	(1)	(1,755)				(1,756)
Repurchase of common stock (in Shares)	(71)
Components of comprehensive loss:
Net income (loss)				(17,434)		(17,434)
Unrealized gains (losses) on available-for-sale investments, net of taxes			110			110
Foreign currency translation adjustment, net of taxes			1,212			1,212
Total comprehensive income (loss), net of taxes						(16,112)
Balance at Mar. 31, 2010	119	203,229	4,286	190,069		397,703
Balance (in Shares) at Mar. 31, 2010	12,040
Sale of common stock under employee option plans	1	2,168				2,169
Sale of common stock under employee option plans (in Shares)	76
Net issuance of restricted shares (in Shares)	(62)
Net settlement of restricted shares	(1)	(860)				(861)
Net settlement of restricted shares (in Shares)	1
Stock-based compensation		1,123				1,123
Repurchase of common stock	(11)	(34,673)				(34,684)
Repurchase of common stock (in Shares)	(1,173)
Components of comprehensive loss:
Net income (loss)				(17,759)		(17,759)
Unrealized gains (losses) on available-for-sale investments, net of taxes			(1,566)			(1,566)
Foreign currency translation adjustment, net of taxes			141			141
Total comprehensive income (loss), net of taxes						(19,184)
Balance at Dec. 31, 2010	108	170,987	2,861	172,310		346,266
Balance (in Shares) at Dec. 31, 2010	10,882
Sale of common stock under employee option plans		29				29
Sale of common stock under employee option plans (in Shares)	1
Net issuance of restricted shares (in Shares)	5
Net settlement of restricted shares (in Shares)	4
Stock-based compensation		523				523
Initial non-controlling interest of The Show					500	500
Components of comprehensive loss:
Net income (loss)				6,769		6,769
Net loss attributable to The Show					(72)	(72)
Unrealized gains (losses) on available-for-sale investments, net of taxes			260			260
Foreign currency translation adjustment, net of taxes			(2,378)			(2,378)
Total comprehensive income (loss), net of taxes						4,579
Balance at Dec. 31, 2011	$ 108	$ 171,539	$ 743	$ 179,079	$ 428	$ 351,897
Balance (in Shares) at Dec. 31, 2011	10,892