Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks	$ 414,280	$ 561,202
Interest-bearing bank deposits	438,606	626,646
Federal funds sold	414	436
Securities available for sale, at fair value (amortized cost of $5,535,212 and $5,496,718)	4,905,423	4,915,195
Securities held to maturity (fair value of $2,436,610 and $2,485,918)	2,653,759	2,684,779
Loans held for sale (includes $15,208 and $13,269 measured at fair value)	16,470	26,124
Loans	23,970,938	23,921,917
Less: allowance for loan losses	(313,726)	(307,907)
Loans, net	23,657,212	23,614,010
Property and equipment, net of accumulated depreciation of $326,472 and $318,746	296,199	301,639
Right of use assets, net of accumulated amortization of $58,824 and $55,815	101,694	105,799
Prepaid expenses	48,773	45,234
Other real estate and foreclosed assets, net	2,793	3,628
Accrued interest receivable	159,095	157,179
Goodwill	855,453	855,453
Other intangible assets, net	42,111	44,637
Life insurance contracts	756,746	749,495
Funded pension assets, net	244,383	216,849
Deferred tax asset, net	165,090	153,384
Other assets	488,618	516,884
Total assets	35,247,119	35,578,573
Deposits
Noninterest-bearing	10,802,127	11,030,515
Interest-bearing	18,973,779	18,659,544
Total deposits	29,775,906	29,690,059
Short-term borrowings	667,760	1,154,829
Long-term debt	236,355	236,317
Accrued interest payable	44,365	45,000
Lease liabilities	120,975	125,618
Other liabilities	548,322	523,089
Total liabilities	31,393,683	31,774,912
Stockholders' equity:
Common stock	309,513	309,513
Capital surplus	1,739,702	1,739,671
Retained earnings	2,457,736	2,375,604
Accumulated other comprehensive loss, net	(653,515)	(621,127)
Total stockholders' equity	3,853,436	3,803,661
Total liabilities and stockholders' equity	$ 35,247,119	$ 35,578,573
Preferred shares authorized (par value of $20.00 per share)	50,000,000	50,000,000
Common shares authorized (par value of $3.33 per share)	350,000,000	350,000,000
Common shares issued	92,947,000	92,947,000
Common shares outstanding	86,622,000	86,345,000