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Loan Facilities (Tables)
 12 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]  
Schedule of Long-term Debt
 
As of December 31,
 
2017
 
2016
 
(in thousands)
Secured term loan
$
339,048

 
$
—

Bank revolving loan
—

 
64,070

Bank term loan
—

 
16,875

Unamortized discount
1,663

 
—

Unamortized debt issuance costs
9,289

 
—

Total debt facilities
350,000

 
80,945

Current maturities of debt
(21,875
)
 
(75,320
)
Total long-term debt
$
328,125

 
$
5,625