Securities (Details) - Changes In Credit Losses Recognized In Earnings - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Changes in Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance		$ 23,709	$ 23,880	$ 23,880	$ 32,422
Losses on securities that previously had OTTI	[1]	0	0	0	28
Reduction for sales of securities	[1],[2]	0	0	(171)	(8,570)
Ending balance		$ 23,709	$ 23,880	$ 23,709	$ 23,880

[1] Included in net securities gains in the Condensed Consolidated Statements of Income.

[2] During the nine months ended September 30, 2015, the Company sold one CMO with a carrying value of $1.3 million that had OTTI of $171,000 that was previously recognized in earnings. The Company sold one CDO with a carrying value of $1.3 million during the nine months ended September 30, 2014 that had OTTI of $8.6 million that was previously recognized in earnings