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Securities - Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost
Due in one year or less	$ 0
Due after one year through five years	0
Due after five years through ten years	11,148
Due after ten years	0
Amortized Cost	11,148
Fair Value
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	10,701
Due after ten years	0
Held to maturity, fair value	10,701	$ 10,848
Amortized Cost
Due in one year or less	12,449
Due after one year through five years	84,650
Due after five years through ten years	207,242
Due after ten years	154,164
Amortized Cost	1,280,854	1,407,675
Fair Value
Due in one year or less	12,419
Due after one year through five years	79,921
Due after five years through ten years	189,784
Due after ten years	132,393
Available for sale, fair value	1,160,965	1,253,631
Commercial mortgage-backed securities
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	108,079
Amortized Cost	108,079	104,459
Fair Value
Without single maturity date	100,172
Available for sale, fair value	100,172	93,396
Residential mortgage-backed securities
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	523,289
Amortized Cost	523,289	569,622
Fair Value
Without single maturity date	475,169
Available for sale, fair value	475,169	506,502
Commercial collateralized mortgage obligations
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	51,401
Amortized Cost	51,401	39,386
Fair Value
Without single maturity date	48,510
Available for sale, fair value	48,510	35,183
Residential collateralized mortgage obligations
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	139,580
Amortized Cost	139,580	150,710
Fair Value
Without single maturity date	122,597
Available for sale, fair value	$ 122,597	$ 130,144

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