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	14,800			14,800
Other comprehensive income	83				83
Total comprehensive income	14,883
Tax effect of stock-based compensation	32		32
Stock-based compensation expense	3,078		3,078
Issuance of common stock, net	(159)	20	(179)
Balance at Mar. 31, 2013	$ 1,161,698	$ 47,576	$ 1,005,534	$ 152,079	$ (43,491)