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Securities OTTI (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Debt Securties Other Than Temporary Impairment Charges [Abstract]      
Other Than Temporary Impairment Charges, Corporate Debt Securities     $ 810
Other Than Temporary Impairment Charges, Trust preferred securities, Pooled 0 0 50
Other Than Temporary Impairment Charges, Trust Preferred Securities, Individual Issuers 130 338 1,168
Other-Than-Temporary Impairment Charges included in earnings 130 338 2,028
Other Than Temporary Impairment On Debt Securities [Abstract]      
Credit Related Other Than Temporary impairement Charges 130 338 1,218
Securities With Intent To Sell, Other Than Temporary Impairment Charges 0 0 810
Non-credit Related Other Than Temporary Impairment Charges 0 130 210
Other Than Temporary Impairment Charges On Debt Securities, Total $ 130 $ 468 $ 2,238