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Loans (Unpaid Principal Balance and Carrying Value of Acquired Loans) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Bank Acquisitions [Member]
   
Loans [Line Items]    
Unpaid Principal Balance $ 674,868 $ 866,874
Carrying Value 503,837 596,946
Life Insurance Premium Finance Acquisition [Member]
   
Loans [Line Items]    
Unpaid Principal Balance 536,503 632,878
Carrying Value $ 514,459 $ 598,463