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Loans - Summary of Impaired Loan Information by Portfolio Class (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
With an allowance recorded [Abstract]
Related Allowance	$ 777	$ 830
Total [Abstract]
Recorded Investment	7,402	7,487
Unpaid Principal Balance	7,494	7,566
Related Allowance	777	830
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
With no related allowance recorded [Abstract]
Recorded Investment	1,023	1,027
Unpaid Principal Balance	1,023	1,027
With an allowance recorded [Abstract]
Recorded Investment	581	584
Unpaid Principal Balance	581	584
Related Allowance	95	97
Total [Abstract]
Recorded Investment	1,604	1,611
Unpaid Principal Balance	1,604	1,611
Related Allowance	95	97
Commercial Loans [Member] | Real Estate [Member]
With no related allowance recorded [Abstract]
Recorded Investment	3,979	3,996
Unpaid Principal Balance	4,052	4,067
With an allowance recorded [Abstract]
Recorded Investment	448	450
Unpaid Principal Balance	448	450
Related Allowance	76	78
Total [Abstract]
Recorded Investment	4,427	4,446
Unpaid Principal Balance	4,500	4,517
Related Allowance	76	78
Commercial Loans [Member] | Lines of Credit [Member]
With no related allowance recorded [Abstract]
Recorded Investment	83	86
Unpaid Principal Balance	83	86
With an allowance recorded [Abstract]
Recorded Investment	98	98
Unpaid Principal Balance	98	98
Related Allowance	98	98
Total [Abstract]
Recorded Investment	181	184
Unpaid Principal Balance	181	184
Related Allowance	98	98
Commercial Loans [Member] | Other Commercial and Industrial [Member]
With no related allowance recorded [Abstract]
Recorded Investment	336	69
Unpaid Principal Balance	355	77
With an allowance recorded [Abstract]
Recorded Investment	545	866
Unpaid Principal Balance	545	866
Related Allowance	379	406
Total [Abstract]
Recorded Investment	881	935
Unpaid Principal Balance	900	943
Related Allowance	379	406
Commercial Loans [Member] | Other Consumer [Member]
With no related allowance recorded [Abstract]
Recorded Investment	55	55
Unpaid Principal Balance	55	55
With an allowance recorded [Abstract]
Recorded Investment	35	36
Unpaid Principal Balance	35	36
Related Allowance	1	1
Total [Abstract]
Recorded Investment	90	91
Unpaid Principal Balance	90	91
Related Allowance	1	1
Consumer Loans [Member] | Home Equity and Junior Liens [Member]
With no related allowance recorded [Abstract]
Recorded Investment	77	40
Unpaid Principal Balance	77	40
With an allowance recorded [Abstract]
Recorded Investment	142	180
Unpaid Principal Balance	142	180
Related Allowance	128	150
Total [Abstract]
Recorded Investment	219	220
Unpaid Principal Balance	219	220
Related Allowance	$ 128	$ 150

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