Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Loans including fees:
Taxable	$ 125,468	$ 97,685	$ 368,467	$ 282,075
Nontaxable	4,075	3,373	11,933	9,788
Investment securities:
Taxable	19,391	15,330	56,562	46,516
Nontaxable	6,295	7,052	19,502	21,652
Money market and other interest-earning investments	140	85	347	171
Total interest income	155,369	123,525	456,811	360,202
Interest Expense
Deposits	11,189	5,125	27,583	14,232
Federal funds purchased and interbank borrowings	1,191	655	2,855	1,433
Securities sold under agreements to repurchase	535	280	1,328	870
Federal Home Loan Bank advances	8,880	6,618	25,484	17,947
Other borrowings	2,732	2,369	8,184	7,108
Total interest expense	24,527	15,047	65,434	41,590
Net interest income	130,842	108,478	391,377	318,612
Provision for loan losses	750	311	3,576	2,013
Net interest income after provision for loan losses	130,092	108,167	387,801	316,599
Noninterest Income
Wealth management fees	9,022	8,837	27,794	27,515
Service charges on deposit accounts	11,028	10,535	32,552	30,418
Debit card and ATM fees	4,706	4,248	14,651	12,920
Mortgage banking revenue	4,348	5,104	13,729	14,516
Investment product fees	5,073	5,193	15,170	15,186
Capital markets income	2,700	1,843	4,094	5,621
Company-owned life insurance	2,958	2,022	7,993	6,288
Net securities gains (losses)	135	2,972	2,417	7,547
Recognition of deferred gain on sale leaseback transactions	394	537	1,183	1,612
Other income	5,593	5,075	17,568	16,934
Total noninterest income	45,957	46,366	137,151	138,557
Noninterest Expense
Salaries and employee benefits	63,158	57,783	193,929	171,953
Occupancy	12,578	11,670	38,731	34,343
Equipment	3,652	3,485	10,945	10,062
Marketing	3,406	2,646	11,065	9,369
Data processing	8,628	7,696	26,752	23,530
Communication	2,473	2,163	8,309	6,865
Professional fees	3,235	4,589	8,888	11,317
Loan expenses	1,564	1,542	5,151	4,866
Supplies	707	547	2,332	1,720
FDIC assessment	2,722	2,197	8,528	6,814
Other real estate owned expense	157	511	702	2,635
Amortization of intangibles	3,283	2,641	10,308	8,442
Amortization of tax credit investments	9,233		21,807
Other expense	4,580	6,232	19,546	16,488
Total noninterest expense	119,376	103,702	366,993	308,404
Income before income taxes	56,673	50,831	157,959	146,752
Income tax expense	5,325	11,459	14,627	32,534
Net income	$ 51,348	$ 39,372	$ 143,332	$ 114,218
Net income per common share - basic	$ 0.34	$ 0.30	$ 0.95	$ 0.85
Net income per common share - diluted	$ 0.34	$ 0.29	$ 0.94	$ 0.84
Weighted average number of common shares outstanding - basic	151,930	135,120	151,844	135,040
Weighted average number of common shares outstanding - diluted	152,784	135,796	152,616	135,693
Dividends per common share	$ 0.13	$ 0.13	$ 0.39	$ 0.39