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Debt, Inventory Financing Facilities, Finance Leases and Other Financing Obligations - Schedule of Convertible Senior Notes Balances (Detail) - Convertible Senior Notes due 2025 [Member] - USD ($)
Mar. 31, 2020
Aug. 15, 2019
Liability:    
Principal $ 350,000,000 $ 300,000,000
Less: debt discount and issuance costs, net of accumulated accretion (62,330,000)  
Net carrying amount 287,670,000  
Equity, net of deferred tax $ 44,731,000