Fair Value (Details 3) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Fair value measurements for financial instruments
Recorded Investment	$ 6,680	$ 5,536
Fair Value, Measurements, Nonrecurring | Residential Real Estate
Fair value measurements for financial instruments
Recorded Investment	1,604	740
Fair Value, Measurements, Nonrecurring | Consumer
Fair value measurements for financial instruments
Recorded Investment	22	2
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Commercial real estate
Fair value measurements for financial instruments
Recorded Investment	$ 251
Fair Value Measurements Valuation Technique(s) Description	Sales Comparison
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)
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
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
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Commercial
Fair value measurements for financial instruments
Recorded Investment	$ 8
Fair Value Measurements Valuation Technique(s) Description	Sales Comparison
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Commercial | Minimum | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	(18.61)
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Commercial | Maximum | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	28.25
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Commercial | Weighted Average | Measurement Input Comparability Adjustment
Fair value measurements for financial instruments
Adjustment for differences between earning multiplier and comparable sales, Percent	(7.66)
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Residential Real Estate
Fair value measurements for financial instruments
Recorded Investment	$ 1,604	$ 740
Fair Value Measurements Valuation Technique(s) Description	Sales comparison	Sales comparison
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	(15.76)	(15.67)
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	27.92	27.92
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	3.03	0.53
Fair Value, Measurements, Nonrecurring | Sales Comparison Valuation | Consumer
Fair value measurements for financial instruments
Recorded Investment	$ 22	$ 2
Fair Value Measurements Valuation Technique(s) Description	Sales comparison	Sales comparison
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	12.04	(21.98)
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	12.04	21.98
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