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Fair Value and Interest Rate Risk - Reconciliation of Level 3 Available-for-sale Securities (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Level 3 fair value, beginning of year $ 10,262 $ 9,427
Purchases 0 0
Realized gain (loss) 0 0
Unrealized loss (73) 778
Transfers in and /or out of Level 3 0 0
Level 3 fair value, end of year $ 10,189 $ 10,205
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Unrealized holding (loss) gain on securities Unrealized holding (loss) gain on securities