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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2015
Commitments And Contingencies [Abstract]  
Off-Balance Sheet Commitments
    2015   2014
Commitments to extend credit $ 514,818 $ 450,343
Standby letters of credit   11,746   8,578
Leases Future Minimum Payments By Years And In The Aggregate
2016 $ 1,644
2017   1,271
2018   1,020
2019   942
2020   810
Thereafter   3,160
  $ 8,847