CONSOLIDATED CONDENSED STATEMENT OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Balance at Dec. 31, 2012	$ 1,143,864	$ 47,556	$ 1,002,603	$ 137,279	$ (43,574)
Net income	30,278			30,278
Other comprehensive loss	(20)				(20)
TOTAL COMPREHENSIVE INCOME (LOSS)	30,258
Tax effect of stock-based compensation	358		358
Stock-based compensation expense	4,624		4,624
Issuance of common stock, net	1,751	341	1,410
Balance at Jun. 30, 2013	$ 1,180,855	$ 47,897	$ 1,008,995	$ 167,557	$ (43,594)