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Stockholders' Equity and Regulatory Capital Reconciliation of stockholders' equity to federal regulatory capital (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] |  |  |  |
Stockholders’ equity of the Corporation | $ 289,588 | $ 260,640 | $ 232,422 | $ 206,162
Net unrealized and accumulated losses on specific items | 13,717 | 15,310 |  |
Disallowed servicing assets | (614) | (706) |  |
Disallowed goodwill and other intangibles | (10,368) | (10,401) |  |
Equity Impact of ASC 326 Phase-in | 1,015 | 0 |  |
Tier 1 capital | 293,338 | 264,843 |  |
Allowable general valuation allowances and subordinated debt | 82,102 | 59,050 |  |
Total capital | $ 375,440 | $ 323,893 |  |

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