Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Retained Earnings
Balance at Dec. 31, 2011	$ 359,703	$ 425	$ 345,619		$ 13,659
Balance Shares at Dec. 31, 2011		42,530,809
Issuances of restricted stock		10	(122)	112
Issuances of restricted stock, Shares		969,223
Amortization of share-based compensation	5,372		5,372
Purchase of treasury stock	(8,472)			(8,472)
Exercise of stock options / vesting of restricted stock	666		(429)	1,095
Net income	34,368				34,368
Balance at Jun. 30, 2012	$ 391,637	$ 435	$ 350,440	$ (7,265)	$ 48,027
Balance Shares at Jun. 30, 2012		43,500,032