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Loans, Troubled Debt Restructurings Segregated by Class (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019 USD ($) Loan	Mar. 31, 2018 USD ($) Loan	Dec. 31, 2018 USD ($) Loan
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan	13	16	40
Post-Modification Outstanding Balance	$ 3,195	$ 1,998	$ 9,017
Commitment to extend additional credit on loans modified in TDRs	$ 45
Defaulted restructured loans, number of loans | Loan	0	0
Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	$ 2,413	$ 1,000	6,915
Rate Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	0	0	0
Combination [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	$ 782	$ 998	$ 2,102
Commercial [Member] | Construction [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan		2	5
Post-Modification Outstanding Balance		$ 47	$ 2,197
Commercial [Member] | Construction [Member] | Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance		32	2,182
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	$ 15
Commercial [Member] | Real Estate [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan	5	9	24
Post-Modification Outstanding Balance	$ 1,470	$ 1,769	$ 5,387
Commercial [Member] | Real Estate [Member] | Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	828	786	4,004
Commercial [Member] | Real Estate [Member] | Rate Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	0	0	0
Commercial [Member] | Real Estate [Member] | Combination [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	$ 642	$ 983	$ 1,383
Commercial [Member] | Other [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan	7	5	8
Post-Modification Outstanding Balance	$ 1,262	$ 182	$ 465
Commercial [Member] | Other [Member] | Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	1,122	182	465
Commercial [Member] | Other [Member] | Rate Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	0	0	0
Commercial [Member] | Other [Member] | Combination [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	$ 140	$ 0	$ 0
Residential [Member] | Construction [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan			0
Post-Modification Outstanding Balance			$ 0
Residential [Member] | Construction [Member] | Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance			0
Residential [Member] | Construction [Member] | Rate Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance			0
Residential [Member] | Construction [Member] | Combination [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance			$ 0
Residential [Member] | Real Estate [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Number of Loans | Loan	1		3
Post-Modification Outstanding Balance	$ 463		$ 968
Residential [Member] | Real Estate [Member] | Term Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	463		264
Residential [Member] | Real Estate [Member] | Rate Modification [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	0		0
Residential [Member] | Real Estate [Member] | Combination [Member]
Troubled Debt Restructurings Segregated by Class [Abstract]
Post-Modification Outstanding Balance	$ 0		$ 704

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

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-Publisher FASB
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Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

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