Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest income:
Interest and fees on loans	$ 126,825	$ 105,772	$ 82,670
Taxable	15,662	13,070	11,708
Exempt from federal income tax	5,381	5,167	4,774
Interest on certificates of deposit investments	137	66	50
Interest on federal funds sold	14	8	62
Interest on deposits with other financial institutions	1,702	482	291
Total interest income	149,721	124,565	99,555
Interest expense:
Interest on deposits	18,939	8,571	3,995
Interest on securities sold under agreements to repurchase	911	330	181
Interest on FHLB borrowings	2,706	2,071	883
Interest on other borrowings	15	446	496
Interest on subordinated debentures	1,476	1,409	927
Total interest expense	24,047	12,827	6,482
Net interest income	125,674	111,738	93,073
Provision for loan losses	6,433	8,667	7,462
Net interest income after provision for loan losses	119,241	103,071	85,611
Other income:
Wealth management revenues	15,570	8,460	5,905
Insurance commissions	16,029	5,592	3,872
Service charges	7,837	7,435	6,920
Securities gains, net	802	901	616
Mortgage banking revenue, net	1,746	1,205	1,184
ATM / debit card revenue	8,491	7,487	6,495
Bank owned life insurance	1,755	1,389	1,638
Other income	(3,787)	(2,945)	(3,706)
Total other income	56,017	35,414	30,336
Other expense:
Salaries and employee benefits	62,578	46,803	39,756
Net occupancy and equipment expense	17,680	14,533	12,596
Net other real estate owned expense	443	282	560
Amortization of intangible assets	219	1,059	905
Amortization of intangible assets	5,848	3,215	2,153
Stationery and supplies	1,104	963	724
Legal and professional	5,164	5,243	3,887
Marketing and donations	2,031	1,794	1,356
ATM / debit card expense	3,488	2,971	2,393
Other expense	13,437	13,117	9,891
Total other expense	111,992	89,980	74,221
Income before income taxes	63,266	48,505	41,726
Income taxes	15,323	11,905	15,042
Net income	47,943	36,600	26,684
Net income	$ 47,943	$ 36,600	$ 26,684
Per share data:
Basic net income per common share	$ 2.88	$ 2.53	$ 2.13
Diluted earnings per common share	2.87	2.52	2.13
Cash dividends declared per common share	$ 0.76	$ 0.70	$ 0.66