Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Cash and due from banks	$ 381,343	$ 453,432
Money market and other interest-earning investments	1,282,087	274,980
Total cash and cash equivalents	1,663,430	728,412
Equity securities, at fair value	69,880	52,507
Investment securities - available-for-sale, at fair value (amortized cost $7,719,944 and $7,772,603, respectively)	6,414,761	6,773,712
Investment securities - held-to-maturity, at amortized cost (fair value $2,393,621 and $2,643,682, respectively)	3,027,914	3,089,147
Federal Home Loan Bank/Federal Reserve Bank stock, at cost	365,588	314,168
Loans held-for-sale, at fair value	122,033	11,926
Loans:
Total loans	32,577,834	31,123,641
Allowance for credit losses on loans	(303,982)	(303,671)
Net loans	32,273,852	30,819,970
Premises and equipment, net	565,607	557,307
Operating lease right-of-use assets	179,284	189,714
Accrued interest receivable	209,503	190,521
Goodwill	1,998,716	1,998,716
Other intangible assets	108,119	126,405
Company-owned life insurance	774,517	768,552
Other assets	1,286,244	1,142,315
Total assets	49,059,448	46,763,372
Deposits:
Noninterest-bearing demand	10,091,352	11,930,798
Interest-bearing:
Checking and NOW	7,495,417	8,340,955
Savings	5,296,985	6,326,158
Money market	8,793,218	5,389,139
Time deposits	5,575,704	3,013,780
Total deposits	37,252,676	35,000,830
Federal funds purchased and interbank borrowings	918	581,489
Securities sold under agreements to repurchase	279,061	432,804
Federal Home Loan Bank advances	4,412,576	3,829,018
Other borrowings	863,455	743,003
Operating lease liabilities	199,937	211,964
Accrued expenses and other liabilities	811,288	835,669
Total liabilities	43,819,911	41,634,777
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,    292,586 and 292,903 shares issued and outstanding, respectively	292,586	292,903
Capital surplus	4,153,977	4,174,265
Retained earnings	1,531,289	1,217,349
Accumulated other comprehensive income (loss), net of tax	(968,815)	(786,422)
Total shareholders’ equity	5,239,537	5,128,595
Total liabilities and shareholders’ equity	49,059,448	46,763,372
Commercial
Loans:
Total loans	9,333,448	9,508,904
Allowance for credit losses on loans	(124,755)	(120,612)
Commercial real estate
Loans:
Total loans	13,916,221	12,457,070
Allowance for credit losses on loans	(144,975)	(138,244)
Residential real estate
Loans:
Total loans	6,696,288	6,460,441
Allowance for credit losses on loans	(20,780)	(21,916)
Consumer credit, net of unearned income
Loans:
Total loans	$ 2,631,877	$ 2,697,226