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AFS Securities (Amortized cost and fair value of AFS securities, with gross unrealized gains and losses) (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 534,513	$ 515,516
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	166	9
Gross Unrealized Losses	21,639	26,496
AFS securities	513,040	489,029
US Treasury Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	220,701	230,807
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Gross Unrealized Losses	7,918	10,236
AFS securities	212,783	220,571
States and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	78,938	81,135
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	3	9
Gross Unrealized Losses	4,719	4,576
AFS securities	74,222	76,568
Auction Rate Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,200	3,200
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Gross Unrealized Losses	371	156
AFS securities	2,829	3,044
Mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	27,545	29,068
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Gross Unrealized Losses	1,717	2,182
AFS securities	25,828	26,886
Collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	195,979	163,156
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	163	0
Gross Unrealized Losses	6,064	8,482
AFS securities	190,078	154,674
Corporate Debt Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,150	8,150
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Gross Unrealized Losses	850	864
AFS securities	$ 7,300	$ 7,286

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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