Securities (Rollfoward of OTTI Recognized in Other Comprehensive income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance at beginning of period	$ 3,325	$ 3,104	$ 2,913
Credit-related impairment loss on debt securities for which an other-than-temporary impairment was not previously recognized	0	0	0
Additional increases to the amount of credit-related impairment loss on debt securities for which an other-than-temporary impairment was previously recognized	3,489	221	191
Balance at end of period	$ 6,814	$ 3,325	$ 3,104