STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands	Total	Common Stock Member	Additional Paid In Capital Member	Retained Earnings Member	Accumulated Other Comprehensive Income Member	Treasury Stock Member
Beginning Balance at Dec. 31, 2010		$ 48,558	$ 130,093	$ 1,072,459	$ (2,813)	$ (88,194)
Net earnings				130,423
Other comprehensive income, net					(62,318)
Dividends paid				(14,893)
Stock options exercised, net		321	5,312			8,648
Share-based compensation			8,046			1,575
Repurchases of common stock						(8,178)
Other			(259)			259
Ending Balance at Dec. 31, 2011	1,229,039	48,879	143,192	1,187,989	(65,131)	(85,890)
Net earnings	64,052			64,052
Other comprehensive income, net	3,555				3,555
Dividends paid				(7,968)
Stock options exercised, net		142	3,296			6,415
Share-based compensation			781			4,022
Repurchases of common stock	4,974					(4,974)
Other			(414)			414
Ending Balance at Jun. 30, 2012	$ 1,298,360	$ 49,021	$ 146,855	$ 1,244,073	$ (61,576)	$ (80,013)