Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest and Dividend Income
Loans	$ 84,572	$ 45,639	$ 40,055
Interest-bearing deposits and federal funds sold	1,199	337	129
Securities	9,709	4,039	3,482
Total interest and dividend income	95,480	50,015	43,666
Interest Expense
Deposits	9,274	5,150	3,648
Short-term borrowings	822	402	252
Long-term borrowings	1,012	752	219
Total interest expense	11,108	6,304	4,119
Net interest income	84,372	43,711	39,547
Provision for loan losses	6,919	2,120	150
Net interest income after provision for loan losses	77,453	41,591	39,397
Noninterest Income
Service fees on deposit accounts	1,998	971	903
Gain on sale of loans	20,080	25,164	19,633
Other income	10,014	5,668	5,529
Total noninterest income	32,092	31,803	26,065
Noninterest Expense
Compensation and employee benefits	43,915	31,778	26,966
Occupancy	3,575	1,685	1,594
Furniture and equipment	3,303	1,359	1,446
Other	30,275	12,968	11,860
Total noninterest expense	81,068	47,790	41,866
Income (loss) before income taxes and undistributed income of subsidiaries	28,477	25,604	23,596
Provision for income taxes	11,977	9,200	8,177
Net income	$ 16,500	$ 16,404	$ 15,419
Earnings per common share:
Basic (in dollars per share)	$ 0.92	$ 1.55	$ 1.46
Diluted (in dollars per share)	$ 0.92	$ 1.54	$ 1.46
Average outstanding shares:
Basic (in shares)	17,988,670	10,586,394	10,513,008
Diluted (in shares)	18,076,304	10,677,561	10,581,871