Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 508,673	$ 526,306
Interest-bearing bank deposits	2,338,661	1,333,352
Federal funds sold	450	434
Securities available for sale, at fair value (amortized cost of $6,609,893 and $5,766,234)	6,630,648	5,999,327
Securities held to maturity (fair value of $1,455,224 and $1,467,581)	1,375,342	1,357,170
Loans held for sale	124,677	136,063
Loans	21,664,859	21,789,931
Less: allowance for loan losses	(424,360)	(450,177)
Loans, net	21,240,499	21,339,754
Property and equipment, net of accumulated depreciation of $278,383 and $271,801	377,514	380,516
Right of use assets, net of accumulated amortization of $26,291 and $23,330	106,925	110,691
Prepaid expenses	40,466	41,443
Other real estate and foreclosed assets, net	9,467	11,648
Accrued interest receivable	108,290	104,268
Goodwill	855,453	855,453
Other intangible assets, net	82,473	86,892
Life insurance contracts	624,512	615,780
Funded pension assets, net	176,391	171,175
Other assets	472,202	568,330
Total assets	35,072,643	33,638,602
Deposits
Noninterest-bearing	13,174,911	12,199,750
Interest-bearing	16,035,609	15,498,127
Total deposits	29,210,520	27,697,877
Short-term borrowings	1,652,747	1,667,513
Long-term debt	397,583	378,322
Accrued interest payable	4,257	4,315
Lease liabilities	126,142	130,627
Deferred tax liability, net	22,993	49,406
Other liabilities	241,498	271,517
Total liabilities	31,655,740	30,199,577
Stockholders' equity:
Common stock	309,513	309,513
Capital surplus	1,764,145	1,757,937
Retained earnings	1,374,688	1,291,506
Accumulated other comprehensive income (loss), net	(31,443)	80,069
Total stockholders' equity	3,416,903	3,439,025
Total liabilities and stockholders' equity	$ 35,072,643	$ 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	86,777,000	86,728,000