Income Taxes Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Effective Income Tax Rate Reconciliation, Percent [Abstract] | |||
| Computed Tax Expense at Statutory Rate | $ 12,345 | $ 11,737 | $ 10,806 |
| Tax-Exempt Income | (2,292) | (2,215) | (2,238) |
| Nondeductible Interest Expense | 36 | 51 | 80 |
| State Taxes, Net of Federal Income Tax Benefit | 805 | 791 | 633 |
| Other Items, Net | (284) | (190) | (202) |
| Income Tax Expense (Benefit), Continuing Operations | $ 10,610 | $ 10,174 | $ 9,079 |