Consolidated statements of income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest income:
Interest and fees on loans	$ 67,639	$ 57,904	$ 194,363	$ 163,126
Interest on securities
Taxable	3,137	3,151	10,254	9,137
Tax-exempt	1,174	1,031	3,478	2,937
Other	1,292	526	2,799	1,303
Total interest income	73,242	62,612	210,894	176,503
Interest expense:
Deposits	13,522	7,864	38,865	18,833
Borrowings	1,415	1,993	3,685	4,969
Total interest expense	14,937	9,857	42,550	23,802
Net interest income	58,305	52,755	168,344	152,701
Provision for loan losses	1,831	1,818	4,103	3,198
Net interest income after provision for loan losses	56,474	50,937	164,241	149,503
Noninterest income:
(Loss) gain from securities, net	(20)	(27)	75	(116)
(Loss) gain on sales or write-downs of other real estate owned	(126)	120	112	(43)
Gain from other assets	44	326	52	239
Other income	2,114	1,257	5,598	4,283
Total noninterest income	38,145	34,355	100,163	103,393
Noninterest expenses:
Salaries, commissions and employee benefits	40,880	35,213	112,495	103,606
Occupancy and equipment expense	4,058	3,514	12,107	10,483
Legal and professional fees	1,993	1,917	5,412	5,925
Data processing	2,816	2,562	7,843	6,735
Merger costs	295	0	4,699	1,193
Amortization of core deposit and other intangibles	1,197	777	3,180	2,432
Advertising	1,895	3,810	7,066	10,500
Other expense	9,801	9,420	29,353	28,848
Total noninterest expense	62,935	57,213	182,155	169,722
Income before income taxes	31,684	28,079	82,249	83,174
Income tax expense	7,718	6,702	20,007	19,978
Net income	$ 23,966	$ 21,377	$ 62,242	$ 63,196
Earnings per common share
Basic (in dollars per share)	$ 0.77	$ 0.69	$ 2.01	$ 2.05
Fully diluted (in dollars per share)	$ 0.76	$ 0.68	$ 1.97	$ 2.01
Mortgage banking income
Noninterest income:
Mortgage banking income, service charges on deposit accounts, ATM and interchange fees, investment services and trust income	$ 29,193	$ 26,649	$ 74,740	$ 81,664
Service charges on deposit accounts
Noninterest income:
Mortgage banking income, service charges on deposit accounts, ATM and interchange fees, investment services and trust income	2,416	2,208	6,822	6,216
ATM and interchange fees
Noninterest income:
Mortgage banking income, service charges on deposit accounts, ATM and interchange fees, investment services and trust income	3,188	2,411	8,846	7,353
Investment services and trust income
Noninterest income:
Mortgage banking income, service charges on deposit accounts, ATM and interchange fees, investment services and trust income	$ 1,336	$ 1,411	$ 3,918	$ 3,797