Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Interest income	$ 92,652	$ 76,657	$ 61,209
Interest expense	25,383	16,505	10,333
Net interest income (loss)	67,269	60,152	50,876
Provision for loan losses	2,300	1,900	2,000
Noninterest income	14,983	10,201	9,337
Noninterest expense	44,473	39,763	34,552
Net income (loss) before taxes	35,479	28,690	23,661
Income tax provision (benefit)	7,621	6,401	10,616
Net income (loss)	27,858	22,289	$ 13,045
Total assets	2,267,195	1,900,614
Mortgage Banking [Member]
Segment Reporting Information [Line Items]
Interest income	729	375
Interest expense
Net interest income (loss)	729	375
Provision for loan losses
Noninterest income	9,923	5,544
Noninterest expense	6,435	4,152
Net income (loss) before taxes	4,217	1,767
Income tax provision (benefit)	886	389
Net income (loss)	3,331	1,378
Total assets	27,356	8,602
Commercial And Retail Banking [Member]
Segment Reporting Information [Line Items]
Interest income	91,923	76,282
Interest expense	24,467	15,922
Net interest income (loss)	67,456	60,360
Provision for loan losses	2,300	1,900
Noninterest income	5,060	4,657
Noninterest expense	37,798	35,371
Net income (loss) before taxes	32,418	27,746
Income tax provision (benefit)	6,978	6,185
Net income (loss)	25,440	21,561
Total assets	2,239,430	1,905,474
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Interest income	13	9
Interest expense	929	592
Net interest income (loss)	(916)	(583)
Provision for loan losses
Noninterest income
Noninterest expense	240	240
Net income (loss) before taxes	(1,156)	(823)
Income tax provision (benefit)	(243)	(173)
Net income (loss)	(913)	(650)
Total assets	242,069	187,327
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Interest income	(13)	(9)
Interest expense	(13)	(9)
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	$ (241,660)	$ (200,789)