Loans and Allowance for Loan Losses - Schedule of Impaired Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Recorded Investment [Abstract]
Recorded investment, total	$ 4,684	$ 7,666
Unpaid Principal Balance [Abstract]
Unpaid principal balance, total	4,782	7,770
Related Allowance [Abstract]
Related allowance	329	403
Average Recorded Investment [Abstract]
Average recorded investment, total	5,207	8,669
Interest Income Recognized [Abstract]
Interest income recognized, total	130	299
Commercial and Industrial [Member]
Recorded Investment [Abstract]
Recorded investment, with no specific allowance recorded	268	61
Recorded investment, with an allowance recorded	203	461
Recorded investment, total	471	522
Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no specific allowance recorded	274	66
Unpaid principal balance, with an allowance recorded	206	493
Unpaid principal balance, total	480	559
Related Allowance [Abstract]
Related allowance	102	176
Average Recorded Investment [Abstract]
Average recorded investment, with no specific allowance recorded	359	84
Average recorded investment, with an allowance recorded	207	587
Average recorded investment, total	566	671
Interest Income Recognized [Abstract]
Interest income recognized, with no specific allowance recorded	11	2
Interest income recognized, with an allowance recorded	8	21
Interest income recognized, total	19	23
Commercial Real Estate [Member]
Recorded Investment [Abstract]
Recorded investment, with no specific allowance recorded	1,065	1,378
Recorded investment, with an allowance recorded	1,807	1,813
Recorded investment, total	2,872	3,191
Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no specific allowance recorded	1,065	1,378
Unpaid principal balance, with an allowance recorded	1,821	1,827
Unpaid principal balance, total	2,886	3,205
Related Allowance [Abstract]
Related allowance	142	159
Average Recorded Investment [Abstract]
Average recorded investment, with no specific allowance recorded	1,222	1,413
Average recorded investment, with an allowance recorded	1,810	1,998
Average recorded investment, total	3,032	3,411
Interest Income Recognized [Abstract]
Interest income recognized, with no specific allowance recorded	48	74
Interest income recognized, with an allowance recorded	28	39
Interest income recognized, total	76	113
Construction and Land [Member]
Recorded Investment [Abstract]
Recorded investment, with no specific allowance recorded	253	2,679
Recorded investment, total	253	2,679
Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no specific allowance recorded	253	2,679
Unpaid principal balance, total	253	2,679
Related Allowance [Abstract]
Related allowance	0	0
Average Recorded Investment [Abstract]
Average recorded investment, with no specific allowance recorded	504	3,289
Average recorded investment, total	504	3,289
Interest Income Recognized [Abstract]
Interest income recognized, with no specific allowance recorded	23	145
Interest income recognized, total	23	145
Residential Real Estate [Member]
Recorded Investment [Abstract]
Recorded investment, with no specific allowance recorded	538	707
Recorded investment, total	538	707
Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no specific allowance recorded	563	727
Unpaid principal balance, total	563	727
Related Allowance [Abstract]
Related allowance	0	0
Average Recorded Investment [Abstract]
Average recorded investment, with no specific allowance recorded	547	720
Average recorded investment, total	547	720
Interest Income Recognized [Abstract]
Interest income recognized, with no specific allowance recorded	12	18
Interest income recognized, total	12	18
Home Equity Lines of Credit [Member]
Recorded Investment [Abstract]
Recorded investment, with an allowance recorded	550	567
Recorded investment, total	550	567
Unpaid Principal Balance [Abstract]
Unpaid principal balance, with an allowance recorded	600	600
Unpaid principal balance, total	600	600
Related Allowance [Abstract]
Related allowance	85	68
Average Recorded Investment [Abstract]
Average recorded investment, with an allowance recorded	558	578
Average recorded investment, total	558	578
Interest Income Recognized [Abstract]
Interest income recognized, with an allowance recorded	0	0
Interest income recognized, total	$ 0	$ 0