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Fair Value - Assets Measured on Nonrecurring Basis (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                      
Specific allowance $ (250) $ (185) $ (300) $ 0 $ (750) $ (600) $ (250) $ (150) $ (735) $ (1,750) $ (1,900)
Remeasured Loans | Nonrecurring | Level 3                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                      
Carrying value of impaired loans before allowance                 633 3,149 4,114
Specific allowance                 (100) (306) (79)
Fair value of impaired loans                 533 2,843 4,035
Foreclosed assets remeasured at initial recognition:                      
Carrying value of foreclosed assets prior to remeasurement                 69 0 266
Charge-offs                 0 0 0
Fair value of foreclosed assets                 69 0 266
Remeasured Loans, Subsequent To Initial Recognition | Nonrecurring | Level 3                      
Foreclosed assets remeasured at initial recognition:                      
Carrying value of foreclosed assets prior to remeasurement                 0 0 133
Write-downs                 0 0 (34)
Fair value of foreclosed assets                 $ 0 $ 0 $ 99