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Loan Facilities (Tables)
12 Months Ended
Dec. 31, 2018
Debt Disclosure [Abstract]  
Schedule of Long-term Debt
 
As of December 31,
 
2018
 
2017
 
(in thousands)
Term Loan Facility carrying value
$
319,479

 
$
339,048

Unamortized discount
1,313

 
1,663

Unamortized debt issuance costs
7,333

 
9,289

Total Term Loan Facility
328,125

 
350,000

Current maturities of Term Loan Facility
(35,000
)
 
(21,875
)
Total long-term debt
$
293,125

 
$
328,125