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Related Parties -Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
MGG Investment Group [Member]        
Related Party Transaction [Line Items]        
Interest expense, related party $ 2.8 $ 0.0 $ 5.8 $ 0.0
MGG Investment Group [Member] | Pivotal Acquisition Corp. [Member] | Debentures [Member]        
Related Party Transaction [Line Items]        
Debt instrument outstanding $ 102.2   $ 102.2  
Carlyle Investment Management, LLC [Member]        
Related Party Transaction [Line Items]        
Agreement termination date     Dec. 19, 2019  
General and administrative [Member] | Carlyle Investment Management, LLC [Member]        
Related Party Transaction [Line Items]        
Management consulting fees       $ 0.5