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Segment Reporting - Assets by Reportable Segment (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total Assets | $ 8,711,530 | $ 6,913,609 |
Total Liabilities | 8,150,796 | 6,370,186 |
Total Stockholders' Equity | 560,734 | 543,423 | $ 528,368
Operating Segments | Loans and Securities |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total Assets | 8,600,220 | 6,760,628 |
Total Liabilities | 8,039,534 | 6,263,163 |
Total Stockholders' Equity | 560,686 | 497,465 |
Operating Segments | Arc Home |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total Assets | 50,016 | 30,778 |
Total Liabilities | 0 | 0 |
Total Stockholders' Equity | 50,016 | 30,778 |
Other |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total Assets | 61,294 | 122,203 |
Total Liabilities | 111,262 | 107,023 |
Total Stockholders' Equity | $ (49,968) | $ 15,180 |

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