CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Thousands, unless otherwise specified	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Common Stock in Treasury	Total
Balance at Dec. 31, 2010	$ 3,477	$ 862,423	$ 2,018,445	$ 83,975	$ (3,444)	$ 2,964,876
Balance, shares at Dec. 31, 2010	347,734
Comprehensive income (loss):
Net income (loss)			637,769			637,769
Other comprehensive income (loss)				324,453		324,453
Comprehensive income (loss)						962,222
Tax benefit for stock-based compensation		14,626				14,626
Stock-based compensation		19,036				19,036
Exercise of stock options	9	6,403				6,412
Issuance of restricted stock, shares	851
Issuance of restricted stock	5	(5)
Cancellation of restricted stock, shares	532
Cancellation of restricted stock		1				1
Tax withholding - stock compensation, shares	(52)
Tax withholding - stock compensation		(262)				(262)
Issuance of stock awards, shares	(7)
Issuance of stock awards	(1)	(42)				(42)
Treasury stock - non-qualified plan		1,135			1,216	2,351
Balance at Dec. 31, 2011	3,491	903,399	2,656,214	408,428	(2,228)	3,969,304
Balance, shares at Dec. 31, 2011	349,059
Comprehensive income (loss):
Net income (loss)			(707,064)			(707,064)
Other comprehensive income (loss)				(258,624)		(258,624)
Comprehensive income (loss)						(965,688)
Stock-based compensation		22,212				22,212
Exercise of stock options, shares	1,607
Exercise of stock options	16	9,168				9,184
Issuance of restricted stock, shares	539
Issuance of restricted stock	5	(5)
Cancellation of restricted stock, shares	(95)
Cancellation of restricted stock	(1)	1
Tax withholding - stock compensation, shares	(11)
Tax withholding - stock compensation		(393)				(393)
Issuance of stock awards, shares	1
Issuance of stock awards		44				44
Treasury stock - non-qualified plan		513			696	1,209
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 (loss)			703,503			703,503
Other comprehensive income (loss)				(154,146)		(154,146)	[1]
Comprehensive income (loss)						549,357
Stock-based compensation		25,502				25,502
Exercise of stock options, shares	834
Exercise of stock options	8	10,088				10,096
Issuance of restricted stock, shares	1,103
Issuance of restricted stock	11	(11)
Cancellation of restricted stock, shares	(74)
Cancellation of restricted stock	(1)	1
Tax withholding - stock compensation, shares	(25)
Tax withholding - stock compensation		(978)				(978)
Issuance of stock awards, shares	1
Issuance of stock awards		49				49
Treasury stock - non-qualified plan		934			1,198	2,132
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

[1] All amounts are net of tax.