Securities Credit Impaired Debt Securities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes in the credit loss component of credit-impaired debt securities
Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held	$ 1,257	$ 3,276	$ 2,938
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses	0	130	338
Other Than Temporary Impairment Credit Losses Recognized In Earnings, Reductions, Securities Sold	(757)	(2,149)	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Deemed Worthless	(500)	0	0
Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held	$ 0	$ 1,257	$ 3,276