CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income	Common Stock in Treasury	Total
Balance at Dec. 31, 2012	$ 3,511	$ 934,939	$ 1,949,150	$ 149,804	$ (1,532)	$ 3,035,872
Balance, shares at Dec. 31, 2012	351,100
Comprehensive income (loss):
Net income			127,515			127,515
Other comprehensive loss				(94,197)		(94,197)
Total comprehensive income						33,318
Stock-based compensation		5,856				5,856
Exercise of stock options, shares	452
Exercise of stock options	5	4,794				4,799
Issuance of restricted stock, shares	3
Cancellation of restricted stock, shares	(24)
Treasury stock - non-qualified plan		923			1,040	1,963
Balance at Mar. 31, 2013	$ 3,516	$ 946,512	$ 2,076,665	$ 55,607	$ (492)	$ 3,081,808
Balance, shares at Mar. 31, 2013	351,531