Business Segments - Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	[1]
Business Segments
Number of Operating Segments | segment	3
Revenues:
Interest income	$ 22,951	$ 22,744
Gains on sales of loans	2,136	2,239
Other noninterest income	4,967	4,207
Total operating income	30,054	29,190
Expenses:
Provision for loan losses	2,395	3,300
Interest expense	3,304	2,576
Salaries and employee benefits	11,907	10,733
Other noninterest expenses	7,770	7,806
Total operating expenses	25,376	24,415
Income (loss) before income taxes	4,678	4,775
Income tax expense (benefit)	907	883
Net income	3,771	3,892
Total assets	1,549,360	1,524,926	$ 1,521,411
Goodwill	14,425	14,425	$ 14,425
Capital expenditures	754	621
Operating Segments | Retail Banking
Revenues:
Interest income	14,324	13,160
Other noninterest income	2,935	2,619
Total operating income	17,259	15,779
Expenses:
Interest expense	2,175	1,617
Salaries and employee benefits	7,475	6,486
Other noninterest expenses	4,903	4,981
Total operating expenses	14,553	13,084
Income (loss) before income taxes	2,706	2,695
Income tax expense (benefit)	416	383
Net income	2,290	2,312
Total assets	1,380,790	1,356,936
Goodwill	3,702	3,702
Capital expenditures	722	572
Operating Segments | Mortgage Banking
Revenues:
Interest income	350	367
Gains on sales of loans	2,136	2,239
Other noninterest income	1,318	857
Total operating income	3,804	3,463
Expenses:
Interest expense	163	143
Salaries and employee benefits	1,627	1,443
Other noninterest expenses	1,244	1,275
Total operating expenses	3,034	2,861
Income (loss) before income taxes	770	602
Income tax expense (benefit)	203	167
Net income	567	435
Total assets	53,642	54,516
Capital expenditures	24	21
Operating Segments | Consumer Finance
Revenues:
Interest income	10,145	10,849
Other noninterest income	196	248
Total operating income	10,341	11,097
Expenses:
Provision for loan losses	2,395	3,300
Interest expense	2,551	2,165
Salaries and employee benefits	2,252	2,265
Other noninterest expenses	1,375	1,307
Total operating expenses	8,573	9,037
Income (loss) before income taxes	1,768	2,060
Income tax expense (benefit)	483	562
Net income	1,285	1,498
Total assets	301,579	292,417
Goodwill	10,723	10,723
Capital expenditures	8	28
Operating Segments | Other
Revenues:
Interest income	2
Other noninterest income	518	483
Total operating income	520	483
Expenses:
Interest expense	285	283
Salaries and employee benefits	553	539
Other noninterest expenses	248	243
Total operating expenses	1,086	1,065
Income (loss) before income taxes	(566)	(582)
Income tax expense (benefit)	(195)	(229)
Net income	(371)	(353)
Total assets	6,836	5,066
Eliminations
Revenues:
Interest income	(1,870)	(1,632)
Total operating income	(1,870)	(1,632)
Expenses:
Interest expense	(1,870)	(1,632)
Total operating expenses	(1,870)	(1,632)
Total assets	$ (193,487)	$ (184,009)

[1] Derived from audited consolidated financial statements.