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Securities - Contractual Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Amortized Cost
Due in one year or less	$ 0
Due after one year through five years	0
Due after five years through ten years	5,180
Due after ten years	0
Held to maturity, amortized cost	5,180
Fair Value
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	5,448
Due after ten years	0
Held to maturity, fair value	5,448	$ 25,117
Amortized Cost
Due in one year or less	22,381
Due after one year through five years	275,228
Due after five years through ten years	203,382
Due after ten years	298,405
Available for sale, amortized cost	1,951,949	1,497,458
Fair Value
Due in one year or less	22,015
Due after one year through five years	268,377
Due after five years through ten years	188,971
Due after ten years	259,221
Available for sale, fair value	1,804,370	1,504,728
Commercial mortgage-backed securities
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	120,787
Available for sale, amortized cost	120,787	65,691
Fair Value
Without single maturity date	110,697
Available for sale, fair value	110,697	64,243
Residential mortgage-backed securities
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	703,369
Available for sale, amortized cost	703,369	559,655
Fair Value
Without single maturity date	649,126
Available for sale, fair value	649,126	557,801
Commercial collateralized mortgage obligations
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	44,876
Available for sale, amortized cost	44,876	20,000
Fair Value
Without single maturity date	40,965
Available for sale, fair value	40,965	19,672
Residential collateralized mortgage obligations
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	204,801
Available for sale, amortized cost	204,801	196,691
Fair Value
Without single maturity date	188,591
Available for sale, fair value	188,591	193,740
Asset-backed securities
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Amortized Cost
Without single maturity date	78,720
Available for sale, amortized cost	78,720	81,985
Fair Value
Without single maturity date	76,407
Available for sale, fair value	$ 76,407	$ 83,062

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