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Shareholders' Equity (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) installment Plan shares | Dec. 31, 2017 USD ($) shares | Dec. 31, 2016 USD ($) shares | Apr. 26, 2001 shares
Number of equity incentive plans | Plan | 3 |  |  |
Share-based compensation, number of shares available for future grants (in shares) | shares | 306,404 |  |  |
Stock option expiration period | 10 years |  |  |
Number of options granted (in shares) | shares |  | 0 | 0 |
Stock compensation expense | $ 718,000 | $ 657,000 | $ 570,000 |
Stock compensation expense not recorded | 0 | 0 | 0 |
Unrecognized expense related to restricted stock and cash entitlements | 2,172,000 | 1,983,000 | 1,774,000 |
Stock compensation expense, net of tax | $ 1,531,000 | $ 1,157,000 | $ 1,195,000 |
Common stock, authorized shares repurchase (in shares) | shares |  |  |  | 911,631
Total shares repurchased (in shares) | shares | 502,447 |  |  |
Common stock, shares repurchased (in shares) | shares | 0 | 0 | 0 |
Bank |  |  |  |
Retained earnings available for payment of dividends to parent company without prior regulatory approval | $ 76,000,000 |  |  |
Nonqualified Stock Options |  |  |  |
Stock option expiration period | 20 years |  |  |
Employee Stock Option |  |  |  |
Number of options granted (in shares) | shares | 0 |  |  |
Stock compensation expense | $ 0 | $ 0 | $ 0 |
Restricted Stock |  |  |  |
Restricted stock as a percent of grant | 60.00% |  |  |
Cash credit entitlements as a percent of grant | 40.00% |  |  |
Number of installments | installment | 3 |  |  |
Restricted stock vesting percentage upon satisfaction of service requirement | 100.00% |  |  |
Restricted Stock | Year One |  |  |  |
Percentage vested | 33.30% |  |  |
Restricted Stock | Year Two |  |  |  |
Percentage vested | 33.30% |  |  |
Restricted Stock | Year Three |  |  |  |
Percentage vested | 33.30% |  |  |
Employee Stock Purchase Plan |  |  |  |
Share-based compensation, number of shares available for future grants (in shares) | shares | 539,293 |  |  |
Stock compensation expense | $ 39,000 | 32,000 | 22,000 |
Unrecognized expense related to restricted stock and cash entitlements | $ 0 | 0 | 0 |
Share-based compensation arrangement, purchase price discount from fair market value | 95.00% |  |  |
Share-based compensation arrangement, number of shares authorized (in shares) | shares | 750,000 |  |  |
Stock compensation expense, net of tax | $ 29,000 | $ 19,000 | $ 50,000 |

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