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
Payments for Repurchase 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	41,312			41,312
Other comprehensive income, net	21,223				21,223
Dividends paid				(3,757)
Stock options exercised, net		142	3,406			5,486
Share-based compensation			(1,306)			3,987
Payments for Repurchase of Common Stock						0
Other			(390)			390
Ending Balance at Mar. 31, 2012	$ 1,299,532	$ 49,021	$ 144,902	$ 1,225,544	$ (43,908)	$ (76,027)