Debt - Term Loans - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Apr. 02, 2020
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Apr. 02, 2021
Dec. 31, 2019
Line of Credit Facility [Line Items]                
Repayments under term loans         $ 222,000,000 $ 1,240,000,000    
Loss on debt extinguishment   $ 7,252,000   $ 5,580,000 7,252,000 $ 11,473,000    
Unamortized deferred financing costs   19,464,000     19,464,000     $ 17,549,000
Term loans                
Line of Credit Facility [Line Items]                
Maximum borrowing capacity $ 200,000,000              
Credit facility maturity date Apr. 02, 2022              
Accordion feature fully exercised     $ 200,000,000          
Deferred financing costs $ 2,500,000              
Repayments under term loans   222,000,000.0            
Loss on debt extinguishment   1,100,000     1,100,000      
Unamortized deferred financing costs   $ 800,000     $ 800,000      
Term loans | Maximum                
Line of Credit Facility [Line Items]                
Increased borrowing capacity under accordion feature $ 400,000,000              
Term loans | Scenario Forecast                
Line of Credit Facility [Line Items]                
One-time fee payable on outstanding principal amount of loans             0.20%  
Term loans | LIBOR                
Line of Credit Facility [Line Items]                
Basis spread on variable rate         1.50%