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Shareholders' Equity (Schedule of Consolidated and Affiliate Bank Actual Capital and Minimum Required Levels) (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2015
Bank |  |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |
Minimum Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer |  |  |  |  | 0.00%
Actual Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer |  |  | 1.875% | 1.25% |
Total Capital (to Risk Weighted Assets) |  |  |  |  |
Actual Amount of Total Capital (to Risk Weighted Assets) |  |  | $ 381,294 | $ 305,773 |
Actual Ratio of Total Capital (to Risk Weighted Assets) |  |  | 12.37% | 12.29% |
Minimum Required For Capital Adequacy Purposes: Amount, Total Capital |  |  | $ 246,594 | $ 199,093 |
Minimum Required For Capital Adequacy Purposes: Ratio, Total Capital (to Risk Weighted Assets) | [1] |  | 8.00% | 8.00% |
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Amount, Total Capital (to Risk Weighted Assets) |  |  | $ 308,242 | $ 248,866 |
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Ratio, Total Capital (to Risk Weighted Assets) |  |  | 10.00% | 10.00% |
Tier 1 (Core) Capital (to Risk Weighted Assets) |  |  |  |  |
Actual Amount of Tier 1 Capital (to Risk Weighted Assets) |  |  | $ 365,471 | $ 290,079 |
Actual Ratio of Tier 1 Capital (to Risk Weighted Assets) |  |  | 11.86% | 11.66% |
Minimum Required For Capital Adequacy Purposes: Amount, Tier 1 Capital (to Risk Weighted Assets) |  |  | $ 184,945 | $ 149,320 |
Minimum Required For Capital Adequacy Purposes: Ratio, Tier 1 Capital (to Risk Weighted Assets) | [1] |  | 6.00% | 6.00% |
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Amount, Tier 1 Capital (to Risk Weighted Assets) |  |  | $ 246,594 | $ 199,093 |
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Ratio, Tier 1 Capital (to Risk Weighted Assets) |  |  | 8.00% | 8.00% |
Common Equity Tier 1 (CET 1) Capital Ratio (to Risk Weighted Assets) |  |  |  |  |
Actual Amount of Common Tier 1 Capital (to Risk Weighted Assets) |  |  | $ 365,471 | $ 290,079 |
Actual Ratio of Common Tier 1 Capital (to Risk Weighted Assets) |  |  | 11.86% | 11.66% |
Minimum Required For Capital Adequacy Purposes: Amount, Common Tier 1 Capital (to Risk Weighted Assets) |  |  | $ 138,709 | $ 111,990 |
Minimum Required For Capital Adequacy Purposes: Ratio, Common Tier 1 Capital (to Risk Weighted Assets) | [1] |  | 4.50% | 4.50% |
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Amount, Common Tier 1 Capital (to Risk Weighted Assets) |  |  | $ 200,357 | $ 161,763 |
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Ratio, Common Tier 1 Capital (to Risk Weighted Assets) |  |  | 6.50% | 6.50% |
Tier 1 (Core) Capital (to Average Assets) |  |  |  |  |
Actual Amount of Tier 1 Capital (to Average Assets) |  |  | $ 365,471 | $ 290,079 |
Actual Ratio of Tier 1 Capital (to Average Assets) |  |  | 9.78% | 9.63% |
Minimum Required For Capital Adequacy Purposes: Amount, Tier 1 Capital (to Average Assets) |  |  | $ 149,484 | $ 120,509 |
Minimum Required For Capital Adequacy Purposes: Ratio, Tier 1 Capital (to Average Assets) | [1] |  | 4.00% | 4.00% |
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Amount, Tier 1 Capital (to Average Assets) |  |  | $ 186,854 | $ 150,637 |
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Ratio, Tier 1 Capital (to Average Assets) |  |  | 5.00% | 5.00% |
Bank | Scenario, Forecast |  |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |
Maximum Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer |  | 2.50% |  |  |
Consolidated |  |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |
Minimum Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer |  |  |  |  | 0.00%
Actual Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer |  |  | 1.875% | 1.25% |
Total Capital (to Risk Weighted Assets) |  |  |  |  |
Actual Amount of Total Capital (to Risk Weighted Assets) |  |  | $ 381,385 | $ 339,391 |
Actual Ratio of Total Capital (to Risk Weighted Assets) |  |  | 12.36% | 13.62% |
Minimum Required For Capital Adequacy Purposes: Amount, Total Capital |  |  | $ 246,805 | $ 199,363 |
Minimum Required For Capital Adequacy Purposes: Ratio, Total Capital (to Risk Weighted Assets) | [1] |  | 8.00% | 8.00% |
Tier 1 (Core) Capital (to Risk Weighted Assets) |  |  |  |  |
Actual Amount of Tier 1 Capital (to Risk Weighted Assets) |  |  | $ 365,562 | $ 323,697 |
Actual Ratio of Tier 1 Capital (to Risk Weighted Assets) |  |  | 11.85% | 12.99% |
Minimum Required For Capital Adequacy Purposes: Amount, Tier 1 Capital (to Risk Weighted Assets) |  |  | $ 185,104 | $ 149,522 |
Minimum Required For Capital Adequacy Purposes: Ratio, Tier 1 Capital (to Risk Weighted Assets) | [1] |  | 6.00% | 6.00% |
Common Equity Tier 1 (CET 1) Capital Ratio (to Risk Weighted Assets) |  |  |  |  |
Actual Amount of Common Tier 1 Capital (to Risk Weighted Assets) |  |  | $ 354,251 | $ 312,637 |
Actual Ratio of Common Tier 1 Capital (to Risk Weighted Assets) |  |  | 11.48% | 12.55% |
Minimum Required For Capital Adequacy Purposes: Amount, Common Tier 1 Capital (to Risk Weighted Assets) |  |  | $ 138,828 | $ 112,142 |
Minimum Required For Capital Adequacy Purposes: Ratio, Common Tier 1 Capital (to Risk Weighted Assets) | [1] |  | 4.50% | 4.50% |
Tier 1 (Core) Capital (to Average Assets) |  |  |  |  |
Actual Amount of Tier 1 Capital (to Average Assets) |  |  | $ 365,562 | $ 323,697 |
Actual Ratio of Tier 1 Capital (to Average Assets) |  |  | 9.75% | 10.71% |
Minimum Required For Capital Adequacy Purposes: Amount, Tier 1 Capital (to Average Assets) |  |  | $ 149,917 | $ 120,862 |
Minimum Required For Capital Adequacy Purposes: Ratio, Tier 1 Capital (to Average Assets) | [1] |  | 4.00% | 4.00% |
Consolidated | Scenario, Forecast |  |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |
Maximum Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer |  | 2.50% |  |  |
[1] | Excludes capital conservation buffer.

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