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Leases - Additional Information (Detail)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
USD ($)
Term
Dec. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Feb. 29, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Lessee Lease Description [Line Items]              
Operating lease, description The Company leases facilities and certain equipment under noncancelable operating leases with remaining lease terms of 0.8 years to 10.2 years, some of which include options to extend for up to two five-year terms.            
Operating lease, option to extend true            
Operating lease, options to extend some of which include options to extend for up to two five-year terms.            
Weighted average remaining lease term 9 years 7 months 6 days            
Weighted average discount rate 4.40%            
Capitalization of right of use asset $ 19,200   $ 40,300        
Capitalization of lease liability 19,200   $ 40,300        
Restricted cash 5,770 $ 5,770   $ 5,770   $ 4,787  
Corporate Office Space Lease Agreement              
Lessee Lease Description [Line Items]              
Operating leases arrangement term         10 years 7 months   10 years 9 months
Corporate Office Space Lease Agreement | Letter of Credit              
Lessee Lease Description [Line Items]              
Restricted cash $ 3,100            
California | Corporate Office Space Lease Agreement              
Lessee Lease Description [Line Items]              
Minimum lease payment amount       $ 51,400 $ 25,300   $ 50,400
Lease commencement period third quarter of 2020            
Minimum [Member]              
Lessee Lease Description [Line Items]              
Operating lease remaining lease term 9 months 18 days            
Maximum              
Lessee Lease Description [Line Items]              
Operating lease remaining lease term 10 years 2 months 12 days            
Number of renewal option terms | Term 2            
Operating lease, renewal term 5 years