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Shareholders' Equity (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Oct. 08, 2015
--- | --- | --- | ---
Total risk-based capital: |  |  |
Actual Regulatory Capital - Amount | $ 455,702 | $ 434,331 |
Capital To Risk Weighted Assets | 0.00% | 0.00% |
Minimum Requirement for capital Adequacy Including Capital Buffer Total Risk-Based Capital Ratio | 10.50% |  |
Minimum Regulatory Capital Required - Ratio |  | 9.875% |
Tier 1 capital: |  |  |
Actual Regulatory Capital - Amount | $ 415,511 | $ 394,597 |
Actual Regulatory Capital - Ratio | 0.00% | 0.00% |
Minimum Requirement for capital Adequacy Including Capital Buffer Tier I Risk-Based Capital Ratio | 8.50% |  |
Minimum Regulatory Capital Required - Ratio |  | 7.875% |
Common equity tier I capital | $ 372,511 | $ 351,597 |
Tier 1 leverage capital ratio: |  |  |
Actual Regulatory Capital - Amount | $ 415,511 | $ 394,597 |
Actual Regulatory Capital - Ratio | 0.00% | 0.00% |
Minimum Regulatory Capital Required - Ratio | 4.00% | 4.00% |
Common Equity Tier I Risk Based Capital Ratio | 0.00% | 0.00% |
Minimum Requirement for capital Adequacy Including Capital Buffer Common Equity Tier I Risk-Based Capital Ratio | 7.00% |  |
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets |  | 6.375% |
Value Of Trust Preferred Securities Included In Tier 1 Capital | $ 43,000 | $ 43,000 | $ 43,000
Subordinated Debt | 59,080 | 59,067 | $ 15,000
Subsidiaries [Member] |  |  |
Total risk-based capital: |  |  |
Actual Regulatory Capital - Amount | $ 423,540 | $ 398,773 |
Capital To Risk Weighted Assets | 0.00% | 0.00% |
Minimum Requirement for capital Adequacy Including Capital Buffer Total Risk-Based Capital Ratio | 10.50% |  |
Minimum Regulatory Capital Required - Ratio |  | 9.875% |
Minimum Regulatory Provision To Be Well Capitalized - Ratio | 10.00% | 10.00% |
Tier 1 capital: |  |  |
Actual Regulatory Capital - Amount | $ 398,349 | $ 374,039 |
Actual Regulatory Capital - Ratio | 0.00% | 0.00% |
Minimum Requirement for capital Adequacy Including Capital Buffer Tier I Risk-Based Capital Ratio | 8.50% |  |
Minimum Regulatory Capital Required - Ratio |  | 7.875% |
Minimum Regulatory Provision To Be Well Capitalized - Ratio | 8.00% | 8.00% |
Common equity tier I capital | $ 398,349 | $ 374,039 |
Tier 1 leverage capital ratio: |  |  |
Actual Regulatory Capital - Amount | $ 398,349 | $ 374,039 |
Actual Regulatory Capital - Ratio | 0.00% | 0.00% |
Minimum Regulatory Capital Required - Ratio | 4.00% | 4.00% |
Minimum Regulatory Provision To Be Well Capitalized - Ratio | 5.00% | 5.00% |
Common Equity Tier I Risk Based Capital Ratio | 0.00% | 0.00% |
Minimum Requirement for capital Adequacy Including Capital Buffer Common Equity Tier I Risk-Based Capital Ratio | 7.00% |  |
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets |  | 6.375% |
Common Equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets | 6.50% | 6.50% |
Tier II Capital [Domain] |  |  |
Tier 1 leverage capital ratio: |  |  |
Subordinated Debt | $ 15,000 | $ 15,000 |

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