Quarterly report pursuant to Section 13 or 15(d)

Debt - Schedule of Debt (Details)

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Debt - Schedule of Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Dec. 05, 2017
Debt Instrument [Line Items]      
Carrying value $ 317,090    
Term Loan      
Debt Instrument [Line Items]      
Principal outstanding 119,590 $ 120,356  
Unamortized discount (217) (233)  
Unamortized debt issuance costs (173) (185)  
Carrying value 119,200 119,938  
Term Loan | Delayed Draw Term Loan      
Debt Instrument [Line Items]      
Principal outstanding 197,500 198,750  
Unamortized discount (767) (821)  
Unamortized debt issuance costs (457) (490)  
Carrying value 196,276 197,439 $ 200,000
Revolving Facility | Line of Credit      
Debt Instrument [Line Items]      
Principal outstanding 50,000 50,000  
Unamortized discount 0 0  
Unamortized debt issuance costs 0 0  
Carrying value $ 50,000 $ 50,000