CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest and dividend income:
Loans, including fees	$ 79,338	$ 70,246	$ 59,110
Other investment income	3,294	2,169	1,190
Federal funds sold	581	464	214
Total interest income	83,213	72,879	60,514
Interest expense:
Deposits	21,951	14,011	7,729
FHLB advances and other borrowings	287	664	890
Total interest expense	22,238	14,675	8,619
Net interest income	60,975	58,204	51,895
Provision for loan losses		1,237	3,058
Net interest income after provision for loan losses	60,975	56,967	48,837
Noninterest income:
Service charges on deposit accounts	1,107	1,036	1,274
Other service charges, commissions and fees	10,384	10,395	8,237
Gain on sale of residential mortgage loans	9,141	5,679	3,035
Mortgage servicing income, net	9,294	11,994	8,168
Gain on sale of SBA loans	5,444	4,616	6,347
SBA servicing income, net	3,745	3,119	4,527
Other income	778	770	817
Total noninterest income	39,893	37,609	32,405
Noninterest expense:
Salaries and employee benefits	24,923	23,569	17,956
Occupancy and equipment	4,749	4,086	2,968
Data processing	1,029	842	801
Advertising	649	613	634
Other expenses	8,650	9,465	8,833
Total noninterest expense	40,000	38,575	31,192
Income before provision for income taxes	60,868	56,001	50,050
Provision for income taxes	16,150	14,667	18,153
Net income	$ 44,718	$ 41,334	$ 31,897
Earnings per share:
Basic (in dollars per share)	$ 1.82	$ 1.71	$ 1.34
Diluted (in dollars per share)	$ 1.81	$ 1.69	$ 1.32