Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Details)

v3.8.0.1
Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Unfunded Commitments | Commitments for Exposure to Credit Loss    
Loss Contingencies [Line Items]    
Reserve for unfunded commitments $ 40 $ 40