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Goodwill and Other Intangible Assets (Summary of the Gross Carrying Amount and Accumulated Amortization of Intangible Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Amortizable intangible assets:      
Customer lists $ 678 $ 678 $ 678
Customer Lists Accumulated Amortization 539 505 495
Core deposit premiums 8,560 8,560 8,560
Core Deposit premiums accumulated amortization 7,183 6,675 6,491
Gross Carrying Amount 9,238 9,238 9,238
Accumulated Amortization 7,722 7,180 6,986
Unamortizable intangible assets:      
Goodwill $ 65,835 $ 65,835 $ 65,835