Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	$ 46,788	$ 59,979
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2025	10,515
2026	9,507
2027	8,292
2028	5,973
2029	1,010
Thereafter	11,491
Goodwill [Roll Forward]
Goodwill	1,044,749	1,044,749	$ 1,044,749
Commercial [Member]
Goodwill [Roll Forward]
Goodwill	910,589	910,589	910,589
Consumer [Member]
Goodwill [Roll Forward]
Goodwill	43,458	43,458	43,458
Wealth Management [Member]
Goodwill [Roll Forward]
Goodwill	90,702	90,702	90,702
Funds Management and Other [Member]
Goodwill [Roll Forward]
Goodwill	0	0	$ 0
Core deposits premiums [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	103,200	103,200
Accumulated amortization	74,654	65,275
Finite-lived intangible assets, net	28,546	37,925
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2025	8,675
2026	7,986
2027	6,956
2028	4,929
2029	0
Thereafter	0
Other identifiable intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	51,671	67,151
Accumulated amortization	33,429	45,097
Finite-lived intangible assets, net	18,242	$ 22,054
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2025	1,840
2026	1,521
2027	1,336
2028	1,044
2029	1,010
Thereafter	$ 11,491