Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Capital Stock, Common	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2010	$ 334,187	$ 907	$ 439	$ 335,922	$ 0	$ (3,081)
Comprehensive income:
Net income	52,810	0	0	52,810	0	0
Unrealized loss on available-for-sale securities, net of tax	0	0	0	0	0	0
Total comprehensive income	52,810
Dividends on common stock, $0.06 per share	(5,417)	0	0	(5,417)	0	0
Repurchases of common stock	(29,643)	0	0	0	(29,643)	0
Balance at Sep. 30, 2011	$ 351,937	$ 907	$ 439	$ 383,315	$ (29,643)	$ (3,081)