Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Interest and Dividend Income, Operating [Abstract]
Interest and Fee Income, Loans and Leases	$ 433,299	$ 454,472
Interest and Dividend Income, Securities, by Taxable Status [Abstract]
Interest Income, Securities, Operating, Taxable	69,702	46,548
Interest Income, Securities, Operating, Tax Exempt	13,956	14,774
Other Interest and Dividend Income	8,920	7,595
Interest and Dividend Income, Operating, Total	525,877	523,388
Interest Expense, Operating and Nonoperating [Abstract]
Interest Expense, Deposits	209,140	226,231
Interest Expense, Federal Funds Purchased and Securities Sold under Agreements to Repurchase	3,622	2,863
Interest Expense, Other Short-Term Borrowings	0	4,708
Interest on FHLB Funding	16,090	21,671
Interest Expense, Long-Term Debt	11,085	10,058
Interest Expense, Operating and Nonoperating, Total	239,937	265,530
Interest Income (Expense), Operating, Total	285,941	257,858
Provision for Loan, Lease, and Other Losses	13,003	24,001
Interest Income (Expense), after Provision for Loan Loss, Total	272,938	233,857
Noninterest Income [Abstract]
Capital Market Fees Net	4,345	4,050
Fees and Commissions, Mortgage Banking and Servicing	3,822	2,662
Gain (Loss) on Sale of Mortgage Loans	(6,976)	0
Bank Owned Life Insurance Income	5,204	2,570
Gain (Loss) on Disposition of Assets	(878)	(306)
Debt Securities, Available-for-Sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment	4	3,879
Noninterest Income, Other Operating Income	2,251	2,327
Noninterest Income, Total	58,776	64,985
Noninterest Expense [Abstract]
Labor and Related Expense	123,897	119,395
Information Technology and Data Processing	27,139	26,200
Occupancy, Net	15,381	13,633
Marketing and Advertising Expense	6,386	6,517
Equipment Expense	4,527	4,599
Professional Fees	6,083	4,672
Payments of Financing Costs	2,594	1,979
Federal Deposit Insurance Corporation Premium Expense	10,436	13,946
Amortization of Intangible Assets	2,203	2,203
Other Noninterest Expense	11,974	4,513
Noninterest Expense, Total	210,619	197,657
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	121,095	101,185
Income Tax Expense (Benefit)	19,409	20,016
Net Income (Loss) Attributable to Parent, Total	101,687	81,169
Preferred Stock Dividends and Other Adjustments	2,875	2,875
Net Income (Loss) Available to Common Stockholders, Basic, Total	$ 98,812	$ 78,294
Earnings Per Share [Abstract]
Earnings Per Share, Basic	$ 0.60	$ 0.52
Earnings Per Share, Diluted	$ 0.59	$ 0.52
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted Average Number of Shares Outstanding, Basic	165,228	149,855
Weighted Average Number of Shares Outstanding, Diluted	166,604	151,292
Fiduciary and Trust [Member]
Noninterest Income [Abstract]
Noninterest Income In Scope of Topic 606	$ 22,498	$ 21,694
Deposit Account [Member]
Noninterest Income [Abstract]
Noninterest Income In Scope of Topic 606	12,814	12,439
Credit and Debit Card [Member]
Noninterest Income [Abstract]
Revenue from Contract with Customer, Including Assessed Tax, Out of Scope Topic 606	10,442	11,267
Financial Service, Other [Member]
Noninterest Income [Abstract]
Revenue from Contract with Customer, Including Assessed Tax, Out of Scope Topic 606	$ 5,251	$ 4,402