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Securities Held-to-Maturity - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Schedule of Held-to-Maturity Securities [Line Items] |  |  |
Held-to-maturity securities, face value | $ 230,495,000 | $ 234,255,000 |
Impairment of held-to-maturity securities | 0 |  |
Interest income (including the amortization of discount) | 13,600,000 | 18,600,000 | $ 13,200,000
APL certificates |  |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |  |
Held-to-maturity securities, face value | 192,791,000 | $ 192,791,000 |
Amount purchased at a discount | $ 119,000,000 |  |
Weighted average variable interest rate (as a percent) | 3.94% |  |
Estimated weighted average remaining maturity period | 6 years 7 months 6 days |  |
Weighted average fixed interest rate | 8.85% | 8.85% |
After one year through five years | $ 19,700,000 |  |
After five years through ten years | $ 173,100,000 |  |
APL certificates | Minimum |  |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |  |
Securities maturity term | 5 years |  |
APL certificates | Maximum |  |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |  |
Securities maturity term | 10 years |  |
Seven B Piece Bonds |  |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |  |
Estimated weighted average remaining maturity period | 6 years 1 month 6 days |  |
Bonds retained percentage | 49.00% |  |
Initial face value of bonds purchased | $ 106,200,000 |  |
Discounted value of bonds purchased | $ 74,700,000 |  |
Held-to-maturity securities sold, percentage | 51.00% |  |
Agency B Piece Bonds |  |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |  |
Weighted average variable interest rate (as a percent) | 3.74% |  |
After one year through five years | $ 11,400,000 |  |
Weighted average effective interest rate | 11.28% | 12.20% |
Within one year | $ 5,900,000 |  |
After ten years | $ 20,400,000 |  |

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