Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 527,880	$ 526,306
Interest-bearing bank deposits	3,062,325	1,333,352
Federal funds sold	456	434
Securities available for sale, at fair value (amortized cost of $6,943,511 and $5,766,234)	7,000,921	5,999,327
Securities held to maturity (fair value of $1,385,967 and $1,467,581)	1,307,701	1,357,170
Loans held for sale	90,618	136,063
Loans	20,886,015	21,789,931
Less: allowance for loan losses	(371,521)	(450,177)
Loans, net	20,514,494	21,339,754
Property and equipment, net of accumulated depreciation of $272,213 and $271,801	350,554	380,516
Right of use assets, net of accumulated amortization of $31,365 and $23,330	98,419	110,691
Prepaid expenses	40,329	41,443
Other real estate and foreclosed assets, net	8,423	11,648
Accrued interest receivable	99,314	104,268
Goodwill	855,453	855,453
Other intangible assets, net	74,146	86,892
Life insurance contracts	661,770	615,780
Funded pension assets, net	220,121	171,175
Other assets	405,384	568,330
Total assets	35,318,308	33,638,602
Deposits
Noninterest-bearing	13,653,376	12,199,750
Interest-bearing	15,554,781	15,498,127
Total deposits	29,208,157	27,697,877
Short-term borrowings	1,745,228	1,667,513
Long-term debt	248,011	378,322
Accrued interest payable	3,060	4,315
Lease liabilities	119,250	130,627
Deferred tax liability, net	31,250	49,406
Other liabilities	333,586	271,517
Total liabilities	31,688,542	30,199,577
Stockholders' equity:
Common stock	309,513	309,513
Capital surplus	1,774,874	1,757,937
Retained earnings	1,545,181	1,291,506
Accumulated other comprehensive income, net	198	80,069
Total stockholders' equity	3,629,766	3,439,025
Total liabilities and stockholders' equity	$ 35,318,308	$ 33,638,602
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	86,823,000	86,728,000