Fair Value (Details 2) - Nonrecurring basis $ in Thousands		Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Impaired loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets held at fair value		$ 258	$ 760
Other real estate owned
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets held at fair value		1,074	773
Level 3 | Impaired loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets held at fair value		258	760
Level 3 | Other real estate owned
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets held at fair value		$ 1,074	$ 773
Level 3 | Liquidation expenses | Minimum | Impaired loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, unobservable input (in percent)	[1]	0	0
Level 3 | Liquidation expenses | Maximum | Impaired loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, unobservable input (in percent)	[1]	6	6
Level 3 | Appraisal of collateral | Appraisal adjustments | Minimum | Impaired loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, unobservable input (in percent)	[2],[3]	0	0
Level 3 | Appraisal of collateral | Appraisal adjustments | Minimum | Other real estate owned
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, unobservable input (in percent)	[2],[3]	0	0
Level 3 | Appraisal of collateral | Appraisal adjustments | Maximum | Impaired loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, unobservable input (in percent)	[2],[3]	20	20
Level 3 | Appraisal of collateral | Appraisal adjustments | Maximum | Other real estate owned
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, unobservable input (in percent)	[2],[3]	20	20

[1] Estimated costs to sell.

[2] Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraised value.

[3] Fair value is generally determined through independent appraisals of the underlying collateral that generally include various level 3 inputs which are not identifiable.