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Securities - Available-for-Sale and Held-to-Maturity by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Securities held-to-maturity, Amortized Cost, Due after ten years	$ 65,255
Securities, held-to-maturity, Amortized Cost, With single maturity date	65,255
Securities, held-to-maturity, Amortized Cost	73,101		$ 74,010
Securities held-to-maturity, Allowance for credit losses	(1,089)	$ (1,084)	(1,087)	$ (1,079)	$ (1,087)	$ (1,100)
Securities held-to-maturity	72,012		72,923
Securities held-to-maturity, Fair Value, Due after ten years	54,153
Securities held-to-maturity, Fair Value, With single maturity date	54,153
Debt Securities, Held-to-maturity, Fair Value, Total	61,070		65,755
Securities available-for-sale, Amortized Cost, Due in one year or less	29,927
Securities available-for-sale, Amortized Cost, Due after one years through five years	75,188
Securities available-for-sale, Amortized Cost, Due after five years through ten years	192,898
Securities available-for-sale, Amortized Cost, Due after ten years	386,885
Securities available-for-sale, Amortized Cost, With single maturity date	684,898
Securities available-for-sale	1,636,359		956,418
Securities available for sale, Fair Value, Due in one year or less	29,291
Securities available for sale, Fair Value, Due after one years through five years	70,119
Securities available for sale, Fair Value, Due after five years through ten years	180,115
Securities available for sale, Fair Value, Due after ten years	387,937
Securities available-for-sale, Fair Value, With single maturity date	667,462
Securities, available-for-sale, Fair Value	1,548,611		874,753
Basis adjustments	6,656		949
Designated as Hedging Instrument [Member] | Portfolio Layer Hedges on Closed Portfolio of Securities Available for Sale [Member]
Basis adjustments	5,200		2,300
Total Other Securities [Member]
Securities, held-to-maturity, Amortized Cost	65,255		66,155
Debt Securities, Held-to-maturity, Fair Value, Total	54,153		58,697
Securities available-for-sale	696,553		538,429
Securities, available-for-sale, Fair Value	679,117		520,409
Collateralized Mortgage Backed Securities
Securities held-to-maturity, Amortized Cost, Without single maturity	7,846
Securities, held-to-maturity, Amortized Cost	7,846		7,855
Securities held-to-maturity, Fair Value, Without single maturity date	6,917
Debt Securities, Held-to-maturity, Fair Value, Total	6,917		7,058
Securities, available-for-sale, Amortized Cost, Without single maturity date	939,806
Securities available-for-sale	939,806		417,989
Securities available-for-sale, Fair Value, Without single maturity date	869,494
Securities, available-for-sale, Fair Value	869,494		354,344
Mutual Fund Debt Securities [Member]
Securities, available-for-sale, Amortized Cost, Without single maturity date	11,655
Securities available-for-sale	11,655		11,660
Securities available-for-sale, Fair Value, Without single maturity date	11,655
Securities, available-for-sale, Fair Value	$ 11,655		$ 11,660

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