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Accumulated Other Comprehensive Income (Loss) (Components of unrealized holding gains on AFS securities) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Unrealized gains (losses) on AFS securities arising during the period $ (2,926) $ 8,610
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax 0 1
Tax effect [1] 632 (1,729)
Unrealized gains (losses), net of tax (2,294) 6,880
Unrealized Holding Gains (Losses) on AFS Securities [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Unrealized gains (losses) on AFS securities arising during the period (2,926) 8,610
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax 0 (1)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax, Total (2,926) 8,609
Tax effect 632 (1,729)
Unrealized gains (losses), net of tax (2,294) 6,880
Unrealized Holding Gains (Losses) on AFS Securities [Member] | Auction Rate Money Market Preferred and Preferred Stocks [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Unrealized gains (losses) on AFS securities arising during the period 82 374
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax 0 0
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax, Total 82 374
Tax effect 0 0
Unrealized gains (losses), net of tax 82 374
Unrealized Holding Gains (Losses) on AFS Securities [Member] | All Other AFS Securities [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Unrealized gains (losses) on AFS securities arising during the period (3,008) 8,236
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax 0 (1)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax, Total (3,008) 8,235
Tax effect 632 (1,729)
Unrealized gains (losses), net of tax $ (2,376) $ 6,506
[1] See “Note 9 – Accumulated Other Comprehensive Income” for tax effect reconciliation.