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Long-term Debt - Other debt (Details) - USD ($)
$ in Thousands
1 Months Ended
Jun. 30, 2018
Dec. 31, 2019
Dec. 31, 2017
Debt Instrument [Line Items]      
Amount outstanding, term loan   $ 384,823  
Line Of Credit Maturing 2020 [Member]      
Debt Instrument [Line Items]      
Write off of deferred debt issuance cost $ 200    
Debt extinguishment fees to lenders 100    
Amount outstanding     $ 29,300
Borrowing capacity     155,000
Term Loan Agreement Maturing 2020 [Member]      
Debt Instrument [Line Items]      
Amount outstanding, term loan     $ 193,200
Write off of unamortized discount 600    
Write off of deferred debt issuance cost 5,300    
Debt extinguishment fees to lenders 1,400    
Debt, fees to third parties $ 100