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Securities - Contractual Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Amortized Cost
Due in one year or less	$ 0
Due after one year through five years	0
Due after five years through ten years	5,164
Due after ten years	6,514
Held to maturity, amortized cost	11,678
Fair Value
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	4,717
Due after ten years	6,131
Held to maturity, fair value	10,848	$ 11,970
Amortized Cost
Due in one year or less	67,657
Due after one year through five years	83,105
Due after five years through ten years	172,944
Due after ten years	176,271
Available for sale, amortized cost	1,407,675	1,844,975
Fair Value
Due in one year or less	67,160
Due after one year through five years	76,814
Due after five years through ten years	153,675
Due after ten years	147,752
Available for sale, fair value	1,253,631	1,641,484
Commercial mortgage-backed securities
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	104,459
Available for sale, amortized cost	104,459	105,536
Fair Value
Without single maturity date	93,396
Available for sale, fair value	93,396	91,943
Residential mortgage-backed securities
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	569,622
Available for sale, amortized cost	569,622	649,765
Fair Value
Without single maturity date	506,502
Available for sale, fair value	506,502	572,303
Commercial collateralized mortgage obligations
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	39,386
Available for sale, amortized cost	39,386	44,330
Fair Value
Without single maturity date	35,183
Available for sale, fair value	35,183	38,813
Residential collateralized mortgage obligations
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	150,710
Available for sale, amortized cost	150,710	170,136
Fair Value
Without single maturity date	130,144
Available for sale, fair value	130,144	146,370
Asset-backed securities
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	43,521
Available for sale, amortized cost	43,521	73,918
Fair Value
Without single maturity date	43,005
Available for sale, fair value	$ 43,005	$ 71,900

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