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Income Taxes - Schedule of Net Operating Loss Carryforwards (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards $ 858,063
2020  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 111,615
2022 to 2024  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 64,656
2025 to 2027  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 47,566
2028 to 2030  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 32,393
2031 to 2033  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 767
2034 to 2036  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 10,141
Thereafter  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 590,925
Federal  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 326,608
Net operating loss carryforwards that will not be available to offset 165,100
Federal | 2020  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 110,035
Federal | 2022 to 2024  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 46,827
Federal | 2025 to 2027  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 13,005
Federal | 2028 to 2030  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 0
Federal | 2031 to 2033  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 0
Federal | 2034 to 2036  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 4,246
Federal | Thereafter  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 152,495
State  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 41,784
State | 2020  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 0
State | 2022 to 2024  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 0
State | 2025 to 2027  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 0
State | 2028 to 2030  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 0
State | 2031 to 2033  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 767
State | 2034 to 2036  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 2,088
State | Thereafter  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 38,929
Foreign  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 489,671
Foreign | 2020  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 1,580
Foreign | 2022 to 2024  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 17,829
Foreign | 2025 to 2027  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 34,561
Foreign | 2028 to 2030  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 32,393
Foreign | 2031 to 2033  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 0
Foreign | 2034 to 2036  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards 3,807
Foreign | Thereafter  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforwards $ 399,501