Investment Securities - Contractual Maturities of Investment Securities - Available-for-sale Securities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Available-for-sale, Amortized Cost
Due in one year or less	$ 23,710
Due after one year through five years	35,095
Due after five years through ten years	40,145
Due after ten years	57,476
Total amortized cost, available for sale	156,426	$ 185,690
Available-for-sale, Fair Value
Due in one year or less	23,463
Due after one year through five years	33,934
Due after five years through ten years	38,487
Due after ten years	48,765
Total fair value, available for sale	$ 144,649	$ 169,993
Weighted average remaining life	2 years 9 months 18 days	3 years