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Fair Value of Financial Instruments (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Aug. 17, 2015
First Lien Credit Facility      
Liabilities:      
Carrying amount $ 312,500,000 $ 312,500,000 $ 435,000
First Lien Credit Facility | Term Loan      
Liabilities:      
Carrying amount 312,500,000 312,500,000  
Long-term debt 287,500,000 234,375,000  
First Lien Credit Facility | Level 2 | Term Loan      
Liabilities:      
Long-term debt 287,500,000 $ 234,375,000  
Senior Credit Facility | Term Loan      
Liabilities:      
Carrying amount 30,000,000    
Long-term debt 30,000,000    
Senior Credit Facility | Level 3 | Term Loan      
Liabilities:      
Long-term debt 30,000,000    
Senior Term Loan      
Liabilities:      
Carrying amount $ 30,000,000