Fair Value (Details 2) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Impaired Loans- Applies to all loan classes, Fair Value	$ 0	$ 4,604
Real estate held for sale - Applies to all classes, Fair Value	705	227
Range Of Input 0-20% [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Real estate held for sale - Applies to all classes, Fair Value		$ 227
Valuation Technique, Fair Value		Appraisals which utilize sales comparison, net income and cost approach
Unobservable Inputs, Fair Value		Discounts for changes in market conditions
Fair Value Measurement Weighted Average Range		0.00%
Range of Input Zero Percentage [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement Range Of Input		0.00%
Range of Input 20% [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trust preferred stock, Fair Value	$ 705
Valuation Technique, Fair Value	Appraisals which utilize sales comparison, net income and cost approach
Unobservable Inputs, Fair Value	Discounts for changes in market conditions
Fair Value Measurement Range Of Input	20.00%
Fair Value Measurement Weighted Average Range	20.00%
Range of Input 10-20% [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Impaired Loans- Applies to all loan classes, Fair Value		$ 4,604
Valuation Technique, Fair Value		Appraisals which utilize sales comparison, net income and cost approach
Unobservable Inputs, Fair Value		Discounts for collection issues and changes in market conditions
Fair Value, Range of Input, Minimum		10.00%
Fair Value, Range of Input, Maximum		20.00%
Fair Value Measurement Weighted Average Range		10.00%