Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 468,063	$ 383,372
Interest-bearing bank deposits	47,604	110,579
Federal funds sold	1,909	515
Securities available for sale, at fair value (amortized cost of $3,480,949 and $2,755,806)	3,549,657	2,691,037
Securities held to maturity (fair value of $2,920,356 and $2,935,856)	2,855,062	2,979,547
Loans held for sale	75,789	28,150
Loans	21,035,952	20,026,411
Less: allowance for loan losses	(195,572)	(194,514)
Loans, net	20,840,380	19,831,897
Property and equipment, net of accumulated depreciation of $245,013 and $225,969	382,934	353,668
Right of use assets, net of accumulated amortization of $9,328	113,598
Prepaid expenses	41,768	35,047
Other real estate and foreclosed assets, net	30,955	26,270
Accrued interest receivable	93,038	86,681
Goodwill	861,291	790,972
Other intangible assets, net	116,078	96,151
Life insurance contracts	609,567	549,300
Deferred tax asset, net		22,967
Funded pension assets, net	171,080	65,125
Other assets	284,776	184,629
Total assets	30,543,549	28,235,907
Deposits
Noninterest-bearing	8,686,383	8,499,027
Interest-bearing	15,514,916	14,651,158
Total deposits	24,201,299	23,150,185
Short-term borrowings	2,108,815	1,589,128
Long-term debt	246,641	224,993
Accrued interest payable	17,956	12,267
Lease liabilities	131,077
Deferred tax liability, net	25,510
Other liabilities	225,871	177,994
Total liabilities	26,957,169	25,154,567
Stockholders' equity:
Common stock	309,513	292,716
Capital surplus	1,919,840	1,725,741
Retained earnings	1,408,183	1,243,592
Accumulated other comprehensive loss, net	(51,156)	(180,709)
Total stockholders' equity	3,586,380	3,081,340
Total liabilities and stockholders' equity	$ 30,543,549	$ 28,235,907
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	87,903,000
Common shares outstanding	90,822,000	85,643,000