Quarterly report pursuant to Section 13 or 15(d)

Credit Facility - Schedule of Additional Detail on Credit Facility (Details)

v3.8.0.1
Credit Facility - Schedule of Additional Detail on Credit Facility (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Line of Credit Facility [Line Items]    
Outstanding balance $ 69,953 $ 69,922
Senior Secured Revolving Credit Facility [Member]    
Line of Credit Facility [Line Items]    
Outstanding balance 70,000 70,000
Value of collateral pledged to credit facility $ 248,000 $ 252,000
Weighted average short-term borrowing rate 3.20% 3.00%