Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Interest income	$ 21,612	$ 17,178
Interest expense	5,794	3,136
Net interest income (loss)	15,818	14,042
Provision for loan losses	300	500
Noninterest income	2,994	2,420
Noninterest expense	10,648	9,205
Net income (loss) before taxes	7,864	6,757
Income tax provision (benefit)	1,855	1,543
Net income (loss)	6,009	5,214
Total assets	2,014,426	1,729,299	$ 1,900,614
Commercial and Retail Banking [Member]
Segment Reporting Information [Line Items]
Interest income	21,519	17,078
Interest expense	5,631	3,019
Net interest income (loss)	15,888	14,059
Provision for loan losses	300	500
Noninterest income	1,137	1,092
Noninterest expense	9,465	8,181
Net income (loss) before taxes	7,260	6,470
Income tax provision (benefit)	1,728	1,483
Net income (loss)	5,532	4,987
Total assets	2,002,957	1,720,017
Mortgage Banking [Member]
Segment Reporting Information [Line Items]
Interest income	93	100
Interest expense
Net interest income (loss)	93	100
Provision for loan losses
Noninterest income	1,857	1,328
Noninterest expense	1,123	964
Net income (loss) before taxes	827	464
Income tax provision (benefit)	174	97
Net income (loss)	653	367
Total assets	11,003	8,814
Corporate [Member]
Segment Reporting Information [Line Items]
Interest income	3	2
Interest expense	166	119
Net interest income (loss)	(163)	(117)
Provision for loan losses
Noninterest income
Noninterest expense	60	60
Net income (loss) before taxes	(223)	(177)
Income tax provision (benefit)	(47)	(37)
Net income (loss)	(176)	(140)
Total assets	194,671	168,137
Eliminations [Member]
Segment Reporting Information [Line Items]
Interest income	(3)	(2)
Interest expense	(3)	(2)
Net interest income (loss)
Provision for loan losses
Noninterest income
Noninterest expense
Net income (loss) before taxes
Income tax provision (benefit)
Net income (loss)
Total assets	$ (194,205)	$ (167,669)