Fair Value Measurement - Schedule of Significant Observable Inputs Used in Fair Value Measurement of Level 3 Assets (Details) - Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	$ 3,179	$ 3,086
Other real estate	664	1,067
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	3,179	3,086
Other real estate	664	1,067
Third party appraisals | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	3,179	3,086
Other real estate	$ 664	$ 1,067