CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income:
Loans (including fee income)	$ 116,723	$ 88,760	$ 57,628
Mortgage-backed securities, CMOs and other assets-backed securities	13,483	11,173	10,644
State and municipal obligations	3,777	3,198	2,735
U.S. GSE securities	1,294	1,630	2,716
Corporate bonds	1,124	840	749
Deposits with banks	147	47	32
Other interest and dividend income	1,168	592	406
Total interest income	137,716	106,240	74,910
Interest expense:
Savings, NOW and money market deposits	5,250	4,002	3,223
Certificates of deposit of $100,000 or more	932	929	767
Other time deposits	684	673	426
Federal funds purchased and repurchase agreements	1,075	474	588
Federal Home Loan Bank advances	3,001	1,425	1,091
Subordinated debentures	4,539	1,261
Junior subordinated debentures	1,364	1,365	1,365
Total interest expense	16,845	10,129	7,460
Net interest income	120,871	96,111	67,450
Provision for loan losses	5,550	4,000	2,200
Net interest income after provision for loan losses	115,321	92,111	65,250
Non-interest income:
Service charges on deposit accounts	4,187	3,737	3,206
Fees for other customer services	4,220	3,317	2,835
Title fee income	1,833	1,866	1,662
Net securities gains (losses)	449	(8)	(1,090)
Other operating income	5,357	3,756	1,553
Total non-interest income	16,046	12,668	8,166
Non-interest expense:
Salaries and employee benefits	40,913	33,871	26,011
Occupancy and equipment	12,798	11,045	7,712
Technology and communications	4,897	3,599	3,175
Marketing and advertising	4,048	3,125	2,430
Professional services	3,646	2,327	1,537
FDIC assessments	1,635	1,593	1,265
Acquisition costs and branch restructuring	(920)	9,766	5,504
Amortization of other intangible assets	2,637	1,447	300
Other operating expenses	7,427	6,117	4,480
Total non-interest expense	77,081	72,890	52,414
Income before income taxes	54,286	31,889	21,002
Income tax expense	18,795	10,778	7,239
Net income	$ 35,491	$ 21,111	$ 13,763
Basic earnings per share (in dollars per share)	$ 2.01	$ 1.43	$ 1.18
Diluted earnings per share (in dollars per share)	$ 2.00	$ 1.43	$ 1.18