Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest income:
Interest and fees on loans	$ 105,772	$ 82,670	$ 61,952
Taxable	13,070	11,708	9,288
Exempt from federal income tax	5,167	4,774	3,726
Interest on certificates of deposit investments	66	50	295
Interest on federal funds sold	8	62	40
Interest on deposits with other financial institutions	482	291	195
Total interest income	124,565	99,555	75,496
Interest expense:
Interest on deposits	8,571	3,995	2,713
Interest on securities sold under agreements to repurchase	330	181	96
Interest on FHLB borrowings	2,071	883	630
Interest on other borrowings	446	496	181
Interest on subordinated debentures	1,409	927	672
Total interest expense	12,827	6,482	4,292
Net interest income	111,738	93,073	71,204
Provision for loan losses	8,667	7,462	2,826
Net interest income after provision for loan losses	103,071	85,611	68,378
Other income:
Trust revenues	5,786	3,744	3,517
Brokerage commissions	2,674	2,161	1,908
Insurance commissions	5,592	3,872	3,452
Service charges	7,435	6,920	6,791
Securities gains, net	901	616	1,192
Mortgage banking revenue, net	1,205	1,184	1,172
ATM / debit card revenue	7,487	6,495	6,004
Bank owned life insurance	1,389	1,638	671
Other income	(2,945)	(3,706)	(2,205)
Total other income	35,414	30,336	26,912
Other expense:
Salaries and employee benefits	46,803	39,756	32,354
Net occupancy and equipment expense	14,533	12,596	11,418
Net other real estate owned expense	282	560	60
Amortization of intangible assets	1,059	905	966
Amortization of intangible assets	3,215	2,153	1,909
Stationery and supplies	963	724	815
Legal and professional	5,243	3,887	3,035
Marketing and donations	1,794	1,356	1,845
ATM / debit card expense	2,971	2,393	1,994
Other expense	13,117	9,891	7,114
Total other expense	89,980	74,221	61,510
Income before income taxes	48,505	41,726	33,780
Income taxes	11,905	15,042	11,940
Net income	36,600	26,684	21,840
Dividends on preferred shares	0	0	825
Net income available to common stockholders	$ 36,600	$ 26,684	$ 21,015
Per share data:
Basic net income per common share available to common stockholders	$ 2.53	$ 2.13	$ 2.07
Diluted earnings per common share	2.52	2.13	2.05
Cash dividends declared per common share	$ 0.70	$ 0.66	$ 0.62