Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Loans including fees:
Taxable	$ 138,972	$ 118,389
Nontaxable	4,223	3,874
Investment securities:
Taxable	28,037	18,804
Nontaxable	7,408	6,549
Money market and other interest-earning investments	278	90
Total interest income	178,918	147,706
Interest Expense
Deposits	16,444	7,255
Federal funds purchased and interbank borrowings	1,918	1,017
Securities sold under agreements to repurchase	662	359
Federal Home Loan Bank advances	9,931	7,780
Other borrowings	2,915	2,723
Total interest expense	31,870	19,134
Net interest income	147,048	128,572
Provision for loan losses	1,043	380
Net interest income after provision for loan losses	146,005	128,192
Noninterest Income
Wealth management fees	8,535	9,026
Service charges on deposit accounts	10,826	10,759
Debit card and ATM fees	5,503	4,865
Mortgage banking revenue	5,011	4,192
Investment product fees	5,271	5,031
Capital markets income	2,517	498
Company-owned life insurance	3,188	2,605
Net debt securities gains (losses)	(103)	788
Other income	5,668	4,141
Total noninterest income	46,416	41,905
Noninterest Expense
Salaries and employee benefits	71,183	64,179
Occupancy	14,578	13,280
Equipment	4,474	3,565
Marketing	3,723	3,697
Data processing	9,341	8,400
Communication	3,054	3,064
Professional fees	2,910	2,730
Loan expenses	1,912	1,744
Supplies	755	722
FDIC assessment	2,087	2,645
Other real estate owned expense	36	349
Amortization of intangibles	4,472	3,609
Amortization of tax credit investments	260	716
Other expense	4,256	8,457
Total noninterest expense	123,041	117,157
Income before income taxes	69,380	52,940
Income tax expense	13,104	4,957
Net income	$ 56,276	$ 47,983
Net income per common share - basic	$ 0.32	$ 0.32
Net income per common share - diluted	$ 0.32	$ 0.31
Weighted average number of common shares outstanding - basic	174,734	151,721
Weighted average number of common shares outstanding - diluted	175,368	152,370
Dividends per common share	$ 0.13	$ 0.13