Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Cash and due from banks	$ 350,990	$ 430,866
Money market and other interest-earning investments	588,509	744,192
Total cash and cash equivalents	939,499	1,175,058
Equity securities, at fair value	84,954	80,372
Investment securities - available-for-sale, at fair value (amortized cost $7,834,082 and $7,684,889, respectively)	6,791,652	6,713,055
Investment securities - held-to-maturity, at amortized cost (fair value $2,547,576 and $2,601,188, respectively)	3,001,349	3,013,493
Federal Home Loan Bank/Federal Reserve Bank stock, at cost	365,588	365,588
Loans held-for-sale, at fair value	19,418	32,006
Loans:
Total loans, net of unearned income	33,623,319	32,991,927
Allowance for credit losses on loans	(319,713)	(307,610)
Net loans	33,303,606	32,684,317
Premises and equipment, net	564,007	565,396
Goodwill	1,998,716	1,998,716
Other intangible assets	96,795	102,250
Company-owned life insurance	767,423	767,902
Accrued interest receivable and other assets	1,601,911	1,591,683
Total assets	49,534,918	49,089,836
Deposits:
Noninterest-bearing demand	9,257,709	9,664,247
Interest-bearing:
Checking and NOW	7,236,667	7,331,487
Savings	5,020,095	5,099,186
Money market	10,234,113	9,561,116
Time deposits	5,950,834	5,579,144
Total deposits	37,699,418	37,235,180
Federal funds purchased and interbank borrowings	50,416	390
Securities sold under agreements to repurchase	274,493	285,206
Federal Home Loan Bank advances	4,193,039	4,280,681
Other borrowings	813,213	764,870
Accrued expenses and other liabilities	908,931	960,609
Total liabilities	43,939,510	43,526,936
Shareholders’ Equity
Preferred stock, 2,000 shares authorized, 231 shares issued and outstanding	230,500	230,500
Common stock, no par value, $1.00 per share stated value, 600,000 shares authorized,    293,330 and 292,655 shares issued and outstanding, respectively	293,330	292,655
Capital surplus	4,157,542	4,159,924
Retained earnings	1,693,664	1,618,630
Accumulated other comprehensive income (loss), net of tax	(779,628)	(738,809)
Total shareholders’ equity	5,595,408	5,562,900
Total liabilities and shareholders’ equity	49,534,918	49,089,836
Commercial
Loans:
Total loans, net of unearned income	9,648,269	9,512,230
Allowance for credit losses on loans	(123,437)	(118,333)
Commercial real estate
Loans:
Total loans, net of unearned income	14,653,958	14,140,629
Allowance for credit losses on loans	(160,640)	(155,099)
Residential real estate
Loans:
Total loans, net of unearned income	6,661,379	6,699,443
Allowance for credit losses on loans	(21,899)	(20,837)
Consumer
Loans:
Total loans, net of unearned income	$ 2,659,713	$ 2,639,625