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Subsequent Events - Additional Information (Details) - Subsequent Event - USD ($)
$ / shares in Units, $ in Millions
Apr. 30, 2019
Apr. 24, 2019
Apr. 12, 2019
Subsequent Event [Line Items]      
Stock repurchase program, authorized amount $ 75.0    
Dividends declared per common share (usd per share)   $ 0.05  
Secured Debt | Term Loan | New TLB      
Subsequent Event [Line Items]      
Line of credit, maximum borrowing capacity     $ 375.0
Debt instrument, periodic payment, principal     4.7
Debt instrument, annual principal payment     $ 18.8
Annual prepayment of principal, period of time required before year end     90 days
Annual principal payment, percentage of excess cash flow     50.00%
Secured Debt | Term Loan | New TLB | London Interbank Offered Rate (LIBOR)      
Subsequent Event [Line Items]      
Basis spread on variable rate (percent)     3.25%
Secured Debt | Revolving Credit Facility      
Subsequent Event [Line Items]      
Covenant, leverage ratio, excess borrowings, minimum     $ 12.5
UNITED STATES | Secured Debt | Term Loan      
Subsequent Event [Line Items]      
Capital stock Of subsidiary, percentage     100.00%
Cogent Partners, LP      
Subsequent Event [Line Items]      
Stock issued during period, acquisitions (in shares) 334,048    
Payment for contingent consideration liability $ 18.9