Annual report pursuant to Section 13 and 15(d)

Term Loan Agreements and Long-Term Debt - Narrative (Details)

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Term Loan Agreements and Long-Term Debt - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
May 22, 2018
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]      
Repayment of long-term obligations $ 22,599 $ 22,513 $ 21
Exit and/or prepayment fees paid 1,470    
Unamortized deferred financing costs 473    
Revolving Loan Agreement      
Debt Instrument [Line Items]      
Repayment of long-term obligations 2,958    
Exit and/or prepayment fees paid $ 236