Fair Value Measurements (Details 5) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Nonrecurring Basis [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired loans	$ 1,828	$ 1,915
Foreclosed assets	880	1,011
Impaired Loans #1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired loans	$ 1,828	$ 1,915
Valuation technique	Discounted cash flows	Discounted cash flows
Impaired Loans #1 [Member] | Nonrecurring Basis [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Weighted average	6.90%	5.89%
Impaired Loans #1 [Member] | Nonrecurring Basis [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate (in percent)	4.25%	4.25%
Impaired Loans #1 [Member] | Nonrecurring Basis [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate (in percent)	8.50%	6.50%
Foreclosed Assets #1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Foreclosed assets	$ 880	$ 1,011
Valuation technique	Discounted appraisals	Discounted appraisals
Foreclosed Assets #1 [Member] | Nonrecurring Basis [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Weighted average	26.06%	30.75%
Foreclosed Assets #1 [Member] | Nonrecurring Basis [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Appraisal adjustments	15.11%	15.11%
Foreclosed Assets #1 [Member] | Nonrecurring Basis [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Appraisal adjustments	60.47%	60.47%