Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets:
Cash and due from banks	$ 383,372	$ 386,948
Interest-bearing bank deposits	110,579	92,157
Federal funds sold	515	227
Securities available for sale, at fair value (amortized cost of $2,755,806 and $2,949,057)	2,691,037	2,910,869
Securities held to maturity (fair value of $2,935,856 and $2,962,010)	2,979,547	2,977,511
Loans held for sale	28,150	39,865
Loans	20,026,411	19,004,163
Less: allowance for loan losses	(194,514)	(217,308)
Loans, net	19,831,897	18,786,855
Property and equipment, net of accumulated depreciation of $225,969 and $214,998	353,668	333,663
Prepaid expense	35,047	28,015
Other real estate and foreclosed assets, net	26,270	27,542
Accrued interest receivable	86,681	82,191
Goodwill	790,972	745,523
Other intangible assets, net	96,151	90,640
Life insurance contracts	549,300	541,081
Deferred tax asset, net	22,967	53,979
Other assets	249,754	239,020
Total assets	28,235,907	27,336,086
Deposits
Noninterest-bearing	8,499,027	8,307,497
Interest-bearing	14,651,158	13,945,705
Total deposits	23,150,185	22,253,202
Short-term borrowings	1,589,128	1,703,890
Long-term debt	224,993	305,513
Accrued interest payable	12,267	8,680
Other liabilities	177,994	179,852
Total liabilities	25,154,567	24,451,137
Stockholders' equity:
Common Stock	292,716	292,716
Capital surplus	1,725,741	1,718,117
Retained earnings	1,243,592	1,008,518
Accumulated other comprehensive loss, net	(180,709)	(134,402)
Total stockholders' equity	3,081,340	2,884,949
Total liabilities and stockholders' equity	$ 28,235,907	$ 27,336,086
Preferred shares authorized (par value of $20.00 per share)	50,000,000	50,000,000
Preferred shares issued
Preferred shares outstanding
Common shares authorized (par value of $3.33 per share)	350,000,000	350,000,000
Common shares issued	87,903,000	87,903,000
Common shares outstanding	85,643,000	85,200,000