Business Segments - Segment Reporting (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]
Business Segments
Number of Operating Segments | segment			3
Revenues:
Interest income	$ 23,992	$ 23,691	$ 71,219	$ 69,086
Gains on sales of loans	3,205	1,752	8,296	6,399
Other noninterest income	5,025	4,875	15,239	13,915
Total operating income	32,222	30,318	94,754	89,400
Expenses:
Provision for loan losses	1,800	2,400	6,005	7,700
Interest expense	3,769	2,803	10,724	8,043
Salaries and employee benefits	11,730	10,967	35,132	32,773
Other noninterest expenses	8,572	7,707	24,396	23,201
Total operating expenses	25,871	23,877	76,257	71,717
Income (loss) before income taxes	6,351	6,441	18,497	17,683
Income tax expense (benefit)	1,466	1,340	3,999	3,620
Net income	4,885	5,101	14,498	14,063
Total assets	1,619,381	1,499,604	1,619,381	1,499,604	$ 1,521,411
Goodwill	14,425	14,425	14,425	14,425	$ 14,425
Capital expenditures	530	759	2,001	2,447
Operating Segments | Retail Banking
Revenues:
Interest income	15,060	14,350	44,803	40,719
Other noninterest income	2,874	2,971	8,899	8,486
Total operating income	17,934	17,321	53,702	49,205
Expenses:
Provision for loan losses			110
Interest expense	2,684	1,727	7,352	4,975
Salaries and employee benefits	7,173	6,851	21,718	20,091
Other noninterest expenses	5,224	4,958	15,267	14,776
Total operating expenses	15,081	13,536	44,447	39,842
Income (loss) before income taxes	2,853	3,785	9,255	9,363
Income tax expense (benefit)	460	627	1,501	1,449
Net income	2,393	3,158	7,754	7,914
Total assets	1,436,986	1,329,507	1,436,986	1,329,507
Goodwill	3,702	3,702	3,702	3,702
Capital expenditures	453	692	1,741	2,286
Operating Segments | Mortgage Banking
Revenues:
Interest income	814	602	1,833	1,468
Gains on sales of loans	3,205	1,752	8,296	6,399
Other noninterest income	1,426	1,246	4,232	3,349
Total operating income	5,445	3,600	14,361	11,216
Expenses:
Interest expense	541	282	1,113	642
Salaries and employee benefits	1,742	1,406	5,133	4,409
Other noninterest expenses	1,526	1,248	4,105	3,841
Total operating expenses	3,809	2,936	10,351	8,892
Income (loss) before income taxes	1,636	664	4,010	2,324
Income tax expense (benefit)	426	174	1,051	620
Net income	1,210	490	2,959	1,704
Total assets	115,547	60,592	115,547	60,592
Capital expenditures	60	52	136	111
Operating Segments | Consumer Finance
Revenues:
Interest income	10,442	10,650	30,952	32,230
Other noninterest income	132	142	465	552
Total operating income	10,574	10,792	31,417	32,782
Expenses:
Provision for loan losses	1,800	2,400	5,895	7,700
Interest expense	2,596	2,418	7,765	6,900
Salaries and employee benefits	2,233	2,160	6,581	6,653
Other noninterest expenses	1,334	1,381	4,120	4,076
Total operating expenses	7,963	8,359	24,361	25,329
Income (loss) before income taxes	2,611	2,433	7,056	7,453
Income tax expense (benefit)	710	664	1,921	2,030
Net income	1,901	1,769	5,135	5,423
Total assets	316,158	300,389	316,158	300,389
Goodwill	10,723	10,723	10,723	10,723
Capital expenditures	17	12	57	47
Operating Segments | Other Segments [Member]
Revenues:
Interest income		4	4	4
Other noninterest income	593	516	1,643	1,528
Total operating income	593	520	1,647	1,532
Expenses:
Interest expense	272	291	867	861
Salaries and employee benefits	582	550	1,700	1,620
Other noninterest expenses	488	120	904	508
Total operating expenses	1,342	961	3,471	2,989
Income (loss) before income taxes	(749)	(441)	(1,824)	(1,457)
Income tax expense (benefit)	(130)	(125)	(474)	(479)
Net income	(619)	(316)	(1,350)	(978)
Total assets	6,000	4,396	6,000	4,396
Capital expenditures		3	67	3
Intersegment Eliminations [Member]
Revenues:
Interest income	(2,324)	(1,915)	(6,373)	(5,335)
Total operating income	(2,324)	(1,915)	(6,373)	(5,335)
Expenses:
Interest expense	(2,324)	(1,915)	(6,373)	(5,335)
Total operating expenses	(2,324)	(1,915)	(6,373)	(5,335)
Total assets	$ (255,310)	$ (195,280)	$ (255,310)	$ (195,280)

[1] Derived from audited consolidated financial statements.