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Fair Value (Details 3) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Fair value measurements for financial instruments
Recorded Investment	$ 5,524	$ 5,723
Fair Value, Measurements, Nonrecurring | Residential Real Estate
Fair value measurements for financial instruments
Recorded Investment	577	640
Fair Value, Measurements, Nonrecurring | Consumer
Fair value measurements for financial instruments
Recorded Investment	32	7
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Commercial real estate
Fair value measurements for financial instruments
Recorded Investment	$ 251	$ 251
Fair Value Measurements Valuation Technique(s) Description	Sales comparison	Sales comparison
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Commercial real estate | Maximum | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	16.16	16.16
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Commercial real estate | Weighted Average | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	9.39	9.39
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Commercial real estate | Minimum | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	(22.70)	(22.70)
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Residential Real Estate
Fair value measurements for financial instruments
Recorded Investment	$ 577	$ 640
Fair Value Measurements Valuation Technique(s) Description	Sales comparison	Sales comparison
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Residential Real Estate | Maximum | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	45.99	45.99
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Residential Real Estate | Weighted Average | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	5.56	6.52
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Residential Real Estate | Minimum | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	(49.90)	(49.90)
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Consumer
Fair value measurements for financial instruments
Recorded Investment	$ 32	$ 7
Fair Value Measurements Valuation Technique(s) Description	Sales comparison	Sales comparison
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Consumer | Maximum | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	9.63	5.71
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Consumer | Weighted Average | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	0.00	0.00
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Consumer | Minimum | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	(9.63)	(5.71)
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Other Real Estate Owned
Fair value measurements for financial instruments
Recorded Investment	$ 51
Fair Value Measurements Valuation Technique(s) Description	Sales comparison
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Other Real Estate Owned | Maximum | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	32.49
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Other Real Estate Owned | Weighted Average | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	7.30
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Other Real Estate Owned | Minimum | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	(39.77)

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