Debt - Schedule of Carrying Values and Fair Values of Term Facility (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt financing fees $ (1,027) $ (1,408)
Total debt with debt financing fees 76,973 83,592
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt 78,000 85,000
Carrying Amount | Short-term debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt 19,250 15,750
Carrying Amount | Long-term debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt 58,750 69,250
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt 78,000 85,000
Fair Value | Short-term debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt 19,250 15,750
Fair Value | Long-term debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt $ 58,750 $ 69,250