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Equity Method Investment in the Joint Venture - (Narrative) (Detail) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Jul. 01, 2019
Dec. 31, 2019
Dec. 31, 2018
Mar. 31, 2017
Mar. 31, 2019
Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]            
Ownership percentage in Joint Venture 41.00% 41.00%     30.00%  
Ownership percentage acquired in exchange   30.00%     30.00%  
Loss from Equity Method Investment in the Joint Venture   $ 104,497 $ 65,805 $ 43,103 $ 70,487 $ 58,680
Investment in the Joint Venture   1,796,512     1,211,996 1,298,759
Net book value of assets         $ 1,483,522 $ 1,620,226
Shares received from Joint Venture 49,285,713          
Additional ownership percentage acquired 11.00%          
Loss on equity method investment   $ 13,900        
Legacy CHC [Member]            
Schedule of Equity Method Investments [Line Items]            
Percentage investment exchanged for membership interest in Joint Venture   45.615%     45.615%  
Legacy CHC [Member] | Joint Venture [Member]            
Schedule of Equity Method Investments [Line Items]            
Ownership percentage in Joint Venture   54.385%     54.385%