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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
Dec. 31, 2015
Dec. 31, 2014
Amortizable intangible assets:    
Customer lists $ 678 $ 678
Customer Lists Accumulated Amortization 550 505
Core deposit premiums 8,560 8,560
Core Deposit premiums accumulated amortization 7,352 6,675
Gross Carrying Amount 9,238 9,238
Accumulated Amortization 7,902 7,180
Unamortizable intangible assets:    
Goodwill $ 65,835 $ 65,835