CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS EQUITY (USD $) In Thousands	Total	Non-Cumulative Preferred Shares	Common Shares	Additional Paid In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Common Shares Held in Treasury, at Cost
Balance as of at Dec. 31, 2009		$ 325,000	$ 548	$ 253,466	$ 3,605,809	$ 138,526	$ 0
Common shares issued, net			13	3,572
Purchases of common shares under share repurchase program			(30)
Exercise of stock options				35,150
Common shares retired				(217,562)
Amortization of share-based compensation				25,450
Other				564
Dividends, Preferred Stock	19,383				(19,383)
Net income	608,476				608,476
Change in unrealized appreciation (decline) in value of investments, net of deferred income tax						252,026
Portion of other than temporary impairment losses recognized in other comprehensive income, net of deferred income tax	(1,641)					(1,641)
Foreign currency translation adjustments, net of deferred income tax	(541)					(541)
Shares repurchased for treasury							(291,533)
Balance as of at Sep. 30, 2010		325,000	531	100,640	4,194,902	388,370	(291,533)
Balance as of at Dec. 31, 2010	4,513,003	325,000	534	110,325	4,422,553	204,503	(549,912)
Common shares issued, net			10	3,910
Purchases of common shares under share repurchase program			0
Exercise of stock options				9,379
Common shares retired				0
Amortization of share-based compensation				25,286
Other				1,982
Dividends, Preferred Stock	19,383				(19,383)
Net income	293,086				293,086
Change in unrealized appreciation (decline) in value of investments, net of deferred income tax						(45,194)
Portion of other than temporary impairment losses recognized in other comprehensive income, net of deferred income tax	(3,303)					(3,303)
Foreign currency translation adjustments, net of deferred income tax	(9,430)					(9,430)
Shares repurchased for treasury							(294,975)
Balance as of at Sep. 30, 2011	$ 4,474,371	$ 325,000	$ 544	$ 150,882	$ 4,696,256	$ 146,576	$ (844,887)