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Loans, Troubled Debt Restructurings Segregated by Class (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019 USD ($) Loan	Sep. 30, 2018 USD ($) Loan	Sep. 30, 2019 USD ($) Loan	Sep. 30, 2018 USD ($) Loan	Dec. 31, 2018 USD ($) Loan
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan	5	7	28	36	40
Post-Modification Outstanding Balance	$ 302,000	$ 2,692,000	$ 7,601,000	$ 7,157,000	$ 9,017,000
Commitment to extend additional credit on loans modified in TDRs	$ 80,000		$ 80,000
Defaulted restructured loans, number of loans | Loan	2	3	2	5
Defaulted restructured loans, recorded balance	$ 64,000	$ 153,000	$ 64,000	$ 195,000
Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	302,000	2,292,000	6,539,000	5,759,000	6,915,000
Rate Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	0	0	0	0	0
Combination [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	$ 0	$ 400,000	$ 1,062,000	$ 1,398,000	$ 2,102,000
Commercial [Member] | Construction [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan				4	5
Post-Modification Outstanding Balance				$ 458,000	$ 2,197,000
Defaulted restructured loans, number of loans | Loan	1	2	0	2
Defaulted restructured loans, recorded balance	$ 0	$ 147,000	$ 0	$ 147,000
Commercial [Member] | Construction [Member] | Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance				443,000	2,182,000
Commercial [Member] | Construction [Member] | Rate Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance				0	0
Commercial [Member] | Construction [Member] | Combination [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance				$ 15,000	$ 15,000
Commercial [Member] | Real Estate [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan	3	6	13	23	24
Post-Modification Outstanding Balance	$ 270,000	$ 2,428,000	$ 5,463,000	$ 5,970,000	$ 5,387,000
Defaulted restructured loans, number of loans | Loan	1	0	1	1
Defaulted restructured loans, recorded balance	$ 30,000	$ 0	$ 30,000	$ 17,000
Commercial [Member] | Real Estate [Member] | Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	270,000	2,028,000	4,784,000	4,587,000	4,004,000
Commercial [Member] | Real Estate [Member] | Rate Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	0	0	0	0	0
Commercial [Member] | Real Estate [Member] | Combination [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	$ 0	$ 400,000	$ 679,000	$ 1,383,000	$ 1,383,000
Commercial [Member] | Other [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan	2		13	8	8
Post-Modification Outstanding Balance	$ 32,000		$ 1,432,000	$ 465,000	$ 465,000
Defaulted restructured loans, number of loans | Loan	1	1	1	2
Defaulted restructured loans, recorded balance	$ 34,000	$ 6,000	$ 34,000	$ 31,000
Commercial [Member] | Other [Member] | Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	32,000		1,292,000	465,000	465,000
Commercial [Member] | Other [Member] | Rate Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	0		0	0	0
Commercial [Member] | Other [Member] | Combination [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	$ 0		$ 140,000	$ 0	$ 0
Residential [Member] | Real Estate [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan		1	2	1	3
Post-Modification Outstanding Balance		$ 264,000	$ 706,000	$ 264,000	$ 968,000
Residential [Member] | Real Estate [Member] | Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance		264,000	463,000	264,000	264,000
Residential [Member] | Real Estate [Member] | Rate Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance		0	0	0	0
Residential [Member] | Real Estate [Member] | Combination [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance		$ 0	$ 243,000	$ 0	$ 704,000

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Number of financing receivables that have been modified by troubled debt restructurings.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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