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Accumulated Other Comprehensive Income (Loss) (Components of unrealized holding gains on AFS securities) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Unrealized gains (losses) arising during the period $ 13,365 $ (50,015) $ (8,371)
Reclassification adjustment for net realized (gains) losses included in net income (67) 0 0
Comprehensive income (loss) before income tax (expense) benefit 13,298 (50,015) (8,371)
Tax effect [1] (2,669) 10,314 1,759
Unrealized gains (losses), net of tax 10,629 (39,701) (6,612)
Unrealized Holding Gains (Losses) on AFS Securities [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Unrealized gains (losses) arising during the period 13,365 (50,015) (8,371)
Reclassification adjustment for net realized (gains) losses included in net income (67) 0 0
Comprehensive income (loss) before income tax (expense) benefit 13,298 (50,015) (8,371)
Tax effect (2,669) 10,314 1,759
Unrealized gains (losses), net of tax 10,629 (39,701) (6,612)
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) arising during the period 589 (900) 5
Reclassification adjustment for net realized (gains) losses included in net income 0 0 0
Comprehensive income (loss) before income tax (expense) benefit 589 (900) 5
Tax effect 0 0 0
Unrealized gains (losses), net of tax 589 (900) 5
Unrealized Holding Gains (Losses) on AFS Securities [Member] | All Other AFS Securities [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Unrealized gains (losses) arising during the period 12,776 (49,115) (8,376)
Reclassification adjustment for net realized (gains) losses included in net income (67) 0 0
Comprehensive income (loss) before income tax (expense) benefit 12,709 (49,115) (8,376)
Tax effect (2,669) 10,314 1,759
Unrealized gains (losses), net of tax $ 10,040 $ (38,801) $ (6,617)
[1] See “Note 16 – Accumulated Other Comprehensive Income (Loss)” in the accompanying notes to consolidated financial statements for tax effect reconciliation.