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Investments in Securities - Additional Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Investments in Securities |  |  |
Securities transferred from available for sale portfolio to held to maturity portfolio | $ 226,500,000 | $ 0 |
Net unrealized gains on transfers | 1,000,000.0 |  |
Net of income tax | $ 775,000 |  |
Net unrealized gains on transfers |  | 118,000 |
Net of income tax |  | 89,000 |
Available-for-sale securities |  | 490,592,000 | $ 501,032,000
Fair value of debt securities reported less than their historical cost |  | $ 472,000,000.0 | $ 173,900,000
Debt securities reported less than their historical cost percent of investment portfolio |  | 96.20% | 34.70%
Held-to-maturity investment portfolio |  | 100.00% |
Held-to-maturity securities |  | $ 202,495,000 | $ 0
Total fair value of held-to-maturity |  | 177,765,000 |
Available-for-sale Securities, Amortized Cost, Total |  | 553,214,000 |
Amortized cost of Held To Maturity securities |  | 202,377,000 | 0
Available-for-sale Securities |  |  |
Investments in Securities |  |  |
Available-for-sale Securities, Amortized Cost, Total |  | 553,214,000 | 489,198,000
Fixed rates of interest |  |  |
Investments in Securities |  |  |
Mortgage backed securities |  | 286,500,000 | 229,400,000
Federal National Mortgage Association Certificates and Obligations (FNMA) |  |  |
Investments in Securities |  |  |
Agency collateralized mortgage obligations |  |  | 180,500,000
Agency mortgage-backed securities |  | 196,400,000 |
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) |  |  |
Investments in Securities |  |  |
Agency collateralized mortgage obligations |  |  | 47,400,000
Agency mortgage-backed securities |  | 90,100,000 |
Government National Mortgage Association Certificates and Obligations (GNMA) |  |  |
Investments in Securities |  |  |
Agency collateralized mortgage obligations |  |  | $ 1,500,000
Agency mortgage-backed securities |  | $ 78,500,000 |

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