CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest income:
Loans (including fee income)	$ 126,420	$ 116,723	$ 88,760
Mortgage-backed securities, CMOs and other asset-backed securities	15,231	13,483	11,173
U.S. GSE securities	1,198	1,294	1,630
State and municipal obligations	3,788	3,777	3,198
Corporate bonds	1,233	1,124	840
Deposits with banks	278	147	47
Other interest and dividend income	1,701	1,168	592
Total interest income	149,849	137,716	106,240
Interest expense:
Savings, NOW and money market deposits	7,858	5,250	4,002
Certificates of deposit of $100,000 or more	1,843	932	929
Other time deposits	725	684	673
Federal funds purchased and repurchase agreements	1,571	1,075	474
Federal Home Loan Bank advances	6,105	3,001	1,425
Subordinated debentures	4,539	4,539	1,261
Junior subordinated debentures	48	1,364	1,365
Total interest expense	22,689	16,845	10,129
Net interest income	127,160	120,871	96,111
Provision for loan losses	14,050	5,550	4,000
Net interest income after provision for loan losses	113,110	115,321	92,111
Non-interest income:
Service charges and other fees	8,996	8,407	7,054
Net securities gains (losses)	38	449	(8)
Title fee income	2,394	1,833	1,866
Gain on sale of Small Business Administration loans	1,689	1,097	507
BOLI income	2,250	1,929	1,225
Other operating income	2,735	2,331	2,024
Total non-interest income	18,102	16,046	12,668
Non-interest expense:
Salaries and employee benefits	45,766	40,913	33,871
Occupancy and equipment	13,998	12,798	11,045
Technology and communications	5,753	4,897	3,599
Marketing and advertising	4,742	4,048	3,125
Professional services	3,153	3,646	2,327
FDIC assessments	1,310	1,635	1,593
Acquisition costs and branch restructuring	8,020	(920)	9,766
Amortization of other intangible assets	1,047	2,637	1,447
Other operating expenses	7,938	7,427	6,117
Total non-interest expense	91,727	77,081	72,890
Income before income taxes	39,485	54,286	31,889
Income tax expense	18,946	18,795	10,778
Net income	$ 20,539	$ 35,491	$ 21,111
Basic earnings per share (in dollars per share)	$ 1.04	$ 2.01	$ 1.43
Diluted earnings per share (in dollars per share)	$ 1.04	$ 2.00	$ 1.43