CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Common Stock In Treasury [Member]	Total
Balance at Dec. 31, 2013	$ 3,529	$ 970,524	$ 2,652,653	$ (4,342)	$ (334)	$ 3,622,030
Balance, shares at Dec. 31, 2013	352,939
Comprehensive income (loss):
Net income			194,190			194,190
Other comprehensive loss				(30,625)		(30,625)	[1]
Comprehensive income			194,190	(30,625)		163,565
Stock-based compensation		9,030				9,030
Exercise of stock options, shares	177					177,504
Exercise of stock options	2	5,841				5,843
Issuance of restricted stock, shares	9
Cancellation of restricted stock, shares	(41)
Treasury stock - non-qualified plan		1			(29)	(28)
Balance at Mar. 31, 2014	$ 3,531	$ 985,396	$ 2,846,843	$ (34,967)	$ (363)	$ 3,800,440
Balance, shares at Mar. 31, 2014	353,084

[1] All amounts are net-of-tax.