Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks	$ 476,811	$ 432,104
Interest-bearing bank deposits	876,058	109,961
Federal funds sold	256	268
Securities available for sale, at fair value (amortized cost of $4,709,075 and $4,637,610)	4,893,996	4,675,304
Securities held to maturity (fair value of $1,562,577 and $1,611,004)	1,480,494	1,568,009
Loans held for sale	67,587	55,864
Loans	21,515,681	21,212,755
Less: allowance for loan losses	(426,003)	(191,251)
Loans, net	21,089,678	21,021,504
Property and equipment, net of accumulated depreciation of $252,459 and $249,527	377,638	380,209
Right of use assets, net of accumulated amortization of $14,719 and $12,194	116,809	110,023
Prepaid expenses	43,772	40,178
Other real estate and foreclosed assets, net	18,460	30,405
Accrued interest receivable	96,167	92,037
Goodwill	855,453	855,453
Other intangible assets, net	101,463	106,807
Life insurance contracts	604,812	608,063
Funded pension assets, net	190,166	185,791
Other assets	472,073	328,777
Total assets	31,761,693	30,600,757
Deposits
Noninterest-bearing	9,204,631	8,775,632
Interest-bearing	15,803,865	15,027,943
Total deposits	25,008,496	23,803,575
Short-term borrowings	2,673,283	2,714,872
Long-term debt	225,606	233,462
Accrued interest payable	11,513	10,200
Lease liabilities	134,908	127,703
Deferred tax liability, net	32,063	37,721
Other liabilities	254,760	205,539
Total liabilities	28,340,629	27,133,072
Stockholders' equity:
Common stock	309,513	309,513
Capital surplus	1,741,156	1,736,664
Retained earnings	1,297,129	1,476,232
Accumulated other comprehensive income (loss), net	73,266	(54,724)
Total stockholders' equity	3,421,064	3,467,685
Total liabilities and stockholders' equity	$ 31,761,693	$ 30,600,757
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	86,275,000	87,515,000