Loans and Allowance for Loan Losses - Schedule of Impaired Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Recorded Investment [Abstract]
Recorded investment, total	$ 7,666	$ 10,862
Unpaid Principal Balance [Abstract]
Unpaid principal balance, total	7,770	10,988
Related Allowance [Abstract]
Related allowance	403	912
Average Recorded Investment [Abstract]
Average recorded investment, total	8,669	11,223
Interest Income Recognized [Abstract]
Interest income recognized, total	299	431
Commercial and Industrial [Member]
Recorded Investment [Abstract]
Recorded investment, with no specific allowance recorded	61
Recorded investment, with an allowance recorded	461	758
Recorded investment, total	522	758
Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no specific allowance recorded	66
Unpaid principal balance, with an allowance recorded	493	788
Unpaid principal balance, total	559	788
Related Allowance [Abstract]
Related allowance	176	247
Average Recorded Investment [Abstract]
Average recorded investment, with no specific allowance recorded	84
Average recorded investment, with an allowance recorded	587	791
Average recorded investment, total	671	791
Interest Income Recognized [Abstract]
Interest income recognized, with no specific allowance recorded	2
Interest income recognized, with an allowance recorded	21	29
Interest income recognized, total	23	29
Commercial Real Estate [Member]
Recorded Investment [Abstract]
Recorded investment, with no specific allowance recorded	1,378	2,383
Recorded investment, with an allowance recorded	1,813	1,248
Recorded investment, total	3,191	3,631
Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no specific allowance recorded	1,378	2,383
Unpaid principal balance, with an allowance recorded	1,827	1,248
Unpaid principal balance, total	3,205	3,631
Related Allowance [Abstract]
Related allowance	159	257
Average Recorded Investment [Abstract]
Average recorded investment, with no specific allowance recorded	1,413	2,429
Average recorded investment, with an allowance recorded	1,998	1,256
Average recorded investment, total	3,411	3,685
Interest Income Recognized [Abstract]
Interest income recognized, with no specific allowance recorded	74	124
Interest income recognized, with an allowance recorded	39	58
Interest income recognized, total	113	182
Construction and Land [Member]
Recorded Investment [Abstract]
Recorded investment, with no specific allowance recorded	2,679	1,829
Recorded investment, with an allowance recorded		3,405
Recorded investment, total	2,679	5,234
Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no specific allowance recorded	2,679	1,881
Unpaid principal balance, with an allowance recorded		3,433
Unpaid principal balance, total	2,679	5,314
Related Allowance [Abstract]
Related allowance	0	357
Average Recorded Investment [Abstract]
Average recorded investment, with no specific allowance recorded	3,289	2,041
Average recorded investment, with an allowance recorded		3,451
Average recorded investment, total	3,289	5,492
Interest Income Recognized [Abstract]
Interest income recognized, with no specific allowance recorded	145	56
Interest income recognized, with an allowance recorded		134
Interest income recognized, total	145	190
Residential Real Estate [Member]
Recorded Investment [Abstract]
Recorded investment, with no specific allowance recorded	707	581
Recorded investment, total	707	581
Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no specific allowance recorded	727	585
Unpaid principal balance, total	727	585
Related Allowance [Abstract]
Related allowance	0	0
Average Recorded Investment [Abstract]
Average recorded investment, with no specific allowance recorded	720	591
Average recorded investment, total	720	591
Interest Income Recognized [Abstract]
Interest income recognized, with no specific allowance recorded	18	22
Interest income recognized, total	18	22
Home Equity Lines of Credit [Member]
Recorded Investment [Abstract]
Recorded investment, with no specific allowance recorded		70
Recorded investment, with an allowance recorded	567	588
Recorded investment, total	567	658
Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no specific allowance recorded		70
Unpaid principal balance, with an allowance recorded	600	600
Unpaid principal balance, total	600	670
Related Allowance [Abstract]
Related allowance	68	51
Average Recorded Investment [Abstract]
Average recorded investment, with no specific allowance recorded		70
Average recorded investment, with an allowance recorded	578	594
Average recorded investment, total	578	664
Interest Income Recognized [Abstract]
Interest income recognized, with no specific allowance recorded		3
Interest income recognized, with an allowance recorded	0	5
Interest income recognized, total	$ 0	$ 8