Loans, Allowance for Credit Losses and Impaired Loans - Loan by Risk Rating (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loans by risk rating
Loans and leases receivable, gross	$ 633,661	$ 632,576
Non-Accrual	5,127	9,148
Troubled debt restructures	10,787	17,816
Performing
Loans by risk rating
Troubled debt restructures	8,370	11,134
Non-performing
Loans by risk rating
Troubled debt restructures	2,417	6,682
TDRS on Non-accrual	2,204	6,012
Past Due 30-89 \| Non-performing
Loans by risk rating
Troubled debt restructures	213	671
Excellent
Loans by risk rating
Loans and leases receivable, gross	7,455	10,899
Superior
Loans by risk rating
Loans and leases receivable, gross	5,979	9,805
Good
Loans by risk rating
Loans and leases receivable, gross	595,008	581,295
Fair
Loans by risk rating
Loans and leases receivable, gross	12,564	14,788
Marginal
Loans by risk rating
Loans and leases receivable, gross		787
Substandard
Loans by risk rating
Loans and leases receivable, gross	12,655	15,003
Other real estate secured
Loans by risk rating
Loans and leases receivable, gross	425,330	426,319
Non-Accrual	2,806	4,423
Troubled debt restructures	8,178	10,341
Other real estate secured \| Performing
Loans by risk rating
Troubled debt restructures	7,058	7,155
Other real estate secured \| Non-performing
Loans by risk rating
Troubled debt restructures	1,120	3,186
TDRS on Non-accrual	1,120	2,546
Other real estate secured \| Past Due 30-89 \| Non-performing
Loans by risk rating
Troubled debt restructures		640
Other real estate secured \| Excellent
Loans by risk rating
Loans and leases receivable, gross	1,098	1,143
Other real estate secured \| Superior
Loans by risk rating
Loans and leases receivable, gross	3,851	7,523
Other real estate secured \| Good
Loans by risk rating
Loans and leases receivable, gross	404,785	402,092
Other real estate secured \| Fair
Loans by risk rating
Loans and leases receivable, gross	7,968	8,084
Other real estate secured \| Marginal
Loans by risk rating
Loans and leases receivable, gross		407
Other real estate secured \| Substandard
Loans by risk rating
Loans and leases receivable, gross	7,628	7,071
1 - 4 Family residential secured
Loans by risk rating
Loans and leases receivable, gross	143,185	145,967
Non-Accrual	2,107	4,547
Troubled debt restructures	2,443	7,269
1 - 4 Family residential secured \| Performing
Loans by risk rating
Troubled debt restructures	1,312	3,979
1 - 4 Family residential secured \| Non-performing
Loans by risk rating
Troubled debt restructures	1,131	3,290
TDRS on Non-accrual	918	3,290
1 - 4 Family residential secured \| Past Due 30-89 \| Non-performing
Loans by risk rating
Troubled debt restructures	213
1 - 4 Family residential secured \| Superior
Loans by risk rating
Loans and leases receivable, gross	254	267
1 - 4 Family residential secured \| Good
Loans by risk rating
Loans and leases receivable, gross	136,693	133,401
1 - 4 Family residential secured \| Fair
Loans by risk rating
Loans and leases receivable, gross	2,977	4,598
1 - 4 Family residential secured \| Marginal
Loans by risk rating
Loans and leases receivable, gross		112
1 - 4 Family residential secured \| Substandard
Loans by risk rating
Loans and leases receivable, gross	3,261	7,589
Other
Loans by risk rating
Loans and leases receivable, gross	65,146	60,290
Non-Accrual	214	178
Troubled debt restructures	166	206
Other \| Non-performing
Loans by risk rating
Troubled debt restructures	166	206
TDRS on Non-accrual	166	175
Other \| Past Due 30-89 \| Non-performing
Loans by risk rating
Troubled debt restructures		31
Other \| Excellent
Loans by risk rating
Loans and leases receivable, gross	6,357	9,756
Other \| Superior
Loans by risk rating
Loans and leases receivable, gross	1,874	2,015
Other \| Good
Loans by risk rating
Loans and leases receivable, gross	53,530	45,802
Other \| Fair
Loans by risk rating
Loans and leases receivable, gross	1,619	2,106
Other \| Marginal
Loans by risk rating
Loans and leases receivable, gross		268
Other \| Substandard
Loans by risk rating
Loans and leases receivable, gross	$ 1,766	$ 343

Amount of financing receivable modified as troubled debt restructuring on nonaccrual status.

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Amount of financing receivable modified as troubled debt restructuring.

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Amount of financing receivable on nonaccrual status.

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