Securities (Rollfoward of OTTI Recognized in Earnings) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Credit related impairment losses on debt securities, beginning balance	$ 0	$ 3,325,000
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	0	0
Additional increases to the amount of credit-related impairment loss on debt securities for which other-than-temporary impairment was previously recognized	0	2,772,000
Other Than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Liquidated	0	(4,868,000)
Credit related impairment losses on debt securities, ending balance	0	1,229,000
Cumulative Credit-rated Impairment Losses Corrected from 2013 Form 10-K			$ 6,800,000