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AFS Securities - Amortized Cost and Fair Value of AFS Securities, with Gross Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Total	$ 524,534	$ 515,516
Gross Unrealized Gains	1,107	9
Gross Unrealized Losses	13,671	26,496
Fair Value	511,970	489,029
U.S. Treasury
Debt Securities, Available-for-sale [Line Items]
Total	210,462	230,807
Gross Unrealized Gains	0	0
Gross Unrealized Losses	4,421	10,236
Fair Value	206,041	220,571
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Total	74,042	81,135
Gross Unrealized Gains	26	9
Gross Unrealized Losses	2,966	4,576
Fair Value	71,102	76,568
Auction Rate Money Market Preferred
Debt Securities, Available-for-sale [Line Items]
Total	3,200	3,200
Gross Unrealized Gains	0	0
Gross Unrealized Losses	410	156
Fair Value	2,790	3,044
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Total	24,696	29,068
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1,299	2,182
Fair Value	23,397	26,886
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Total	203,984	163,156
Gross Unrealized Gains	1,081	0
Gross Unrealized Losses	3,852	8,482
Fair Value	201,213	154,674
Corporate
Debt Securities, Available-for-sale [Line Items]
Total	8,150	8,150
Gross Unrealized Gains	0	0
Gross Unrealized Losses	723	864
Fair Value	$ 7,427	$ 7,286

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