Segment and Related Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	[1]
Segment Reporting [Abstract]
Number of reportable segments | segment			2
Segment Reporting Information [Line Items]
Interest income	$ 24,958	$ 17,217	$ 68,265	$ 50,877
Interest expense	4,336	2,466	11,586	6,795
Noninterest income	4,171	3,380	11,304	10,276
Income (loss) before income taxes	11,013	7,250	16,952	21,847
Net income (loss)	8,692	5,785	13,465	17,577
Depreciation and amortization	994	489	2,465	1,576
Total assets	2,454,529	1,806,491	2,454,529	1,806,491	$ 1,862,866
Goodwill	84,633	43,872	84,633	43,872	$ 43,872
Capital expenditures	771	390	2,070	1,322
Operating Segments | Community Banking
Segment Reporting Information [Line Items]
Interest income	24,841	17,124	67,942	50,604
Interest expense	3,818	2,078	10,174	5,787
Noninterest income	2,995	2,287	7,598	6,461
Income (loss) before income taxes	11,150	7,228	18,096	21,325
Net income (loss)	8,807	5,763	14,477	17,141
Depreciation and amortization	992	487	2,459	1,568
Total assets	2,441,553	1,796,677	2,441,553	1,796,677
Goodwill	84,633	43,872	84,633	43,872
Capital expenditures	771	390	2,063	1,322
Operating Segments | Trust and Investment Services
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Interest expense	0	0	0	0
Noninterest income	1,162	1,173	3,342	3,479
Income (loss) before income taxes	589	634	1,628	1,654
Net income (loss)	458	506	1,293	1,330
Depreciation and amortization	2	2	6	8
Total assets	24	18	24	18
Goodwill	0	0	0	0
Capital expenditures	0	0	7	0
Other
Segment Reporting Information [Line Items]
Interest income	117	93	323	273
Interest expense	518	388	1,412	1,008
Noninterest income	14	(80)	364	336
Income (loss) before income taxes	(726)	(612)	(2,772)	(1,132)
Net income (loss)	(573)	(484)	(2,305)	(894)
Depreciation and amortization	0	0	0	0
Total assets	356,511	244,124	356,511	244,124
Goodwill	0	0	0	0
Capital expenditures	0	0	0	0
Intersegment Eliminations
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Interest expense	0	0	0	0
Noninterest income	0	0	0	0
Income (loss) before income taxes	0	0	0	0
Net income (loss)	0	0	0	0
Depreciation and amortization	0	0	0	0
Total assets	(343,559)	(234,328)	(343,559)	(234,328)
Goodwill	0	0	0	0
Capital expenditures	$ 0	$ 0	$ 0	$ 0

[1] Derived from audited consolidated financial statements.