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Loans and Asset Quality Information (Schedule of Applied Cost Recovery Method of Purchased Impaired Loans) (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Purchased impaired loans (substantially all of which are covered loans)    
Balance, beginning, carrying value $ 2,597 $ 3,142
Change due to payments received $ (211) (826)
Change due to loan charge-off   (31)
Other   312
Balance, ending, carrying value $ 2,386 2,597
Contractual Principal Receivable [Member]    
Purchased impaired loans (substantially all of which are covered loans)    
Balance, beginning, contractual principal 5,859 6,263
Change due to payments received (99) (599)
Change due to loan charge-off   (2)
Other (3) 197
Balance, ending, contractual principal 5,757 5,859
Fair Value Adjustment Write Down [Member]    
Purchased impaired loans (substantially all of which are covered loans)    
Balance, beginning, FMV 3,262 3,121
Change due to payments received 112 227
Change due to loan charge-off   29
Other (3) (115)
Balance, ending, FMV $ 3,371 $ 3,262