Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) In Thousands	Total	Additional Paid-In Capital	Treasury Stock - Common Stock Voting	Retained Earnings (Deficit)	Accumulated Other Comprehensive Loss	Common Stock Voting	Common Stock Non-Voting
Balance at Dec. 31, 2011	$ 312,439	$ 340,716	$ (25,933)	$ (584)	$ (1,882)	$ 113	$ 9
Net income	13,493			13,493
Cumulative translation adjustment and foreign currency exchange hedge, net of tax	(132)				(132)
Unrealized net gain on securities available-for-sale, net of taxes	(199)				(199)
Stock-based compensation	1,962	1,962
Exercise of stock options	326	326
Withholding tax payments on restricted stock vesting	(5,818)	(5,818)
Excess tax benefits from stock-based compensation	2,163,000	2,163
Conversion of common stock non-voting to common stock voting		(15,878)	15,878			2	(2)
Repurchases of common stock	(71,116)	(52,881)	(18,228)				(7)
Cash dividend on common stock	(4,201)			(4,201)
Balance at Mar. 31, 2012	$ 248,917	$ 270,590	$ (28,283)	$ 8,708	$ (2,213)	$ 115	$ 0