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Loans and Asset Quality Information (Schedule of Covered Purchased Nonimpaired Loans) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 22, 2016
Apr. 01, 2016
Dec. 31, 2016
Dec. 31, 2015
Covered purchased nonimpaired loans:        
Carrying amount of nonimpaired covered loans at December 31, 2014     $ 101,252 $ 125,644
Principal repayments     (7,997) (30,238)
Transfers to foreclosed real estate     (1,036) (1,211)
Net loan recoveries     1,784 2,306
Accretion of loan discount     1,908 4,751
Balance, ending, carrying value     $ 101,252
Transfers to non-covered loans due to expiration of loss-share agreement $ (78,381) $ (17,530)