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Deposits (Tables)
 12 Months Ended
Dec. 31, 2017
Deposits [Abstract]  
Summary Of Deposits
    2017   2016
Noninterest-bearing demand $ 718,498 $ 677,076
Interest-bearing demand   634,203   581,436
Savings and money market   1,005,317   1,034,194
Time deposits, due:        
Within one year   678,352   471,494
One to two years   108,653   158,399
Two to three years   29,994   23,548
Three to five years   35,157   49,075
Thereafter   -   -
Total time deposits   852,156   702,516
Total deposits $ 3,210,174 $ 2,995,222
Interest Expense By Deposits Type
    2017   2016   2015
Interest-bearing demand $ 897 $ 833 $ 754
Savings and money market   1,487   1,339   1,166
Time deposits   8,709   6,286   5,386
Total interest expense on deposits $ 11,093 $ 8,458 $ 7,306