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Leases - Additional Information (Detail)
$ in Thousands
 6 Months Ended
Jun. 30, 2021
USD ($)
Term
Dec. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
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 0.5 years to 9.9 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 4 months 24 days              
Weighted average discount rate 4.30%              
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 6 months              
Maximum                
Lessee Lease Description [Line Items]                
Operating lease remaining lease term 9 years 10 months 24 days              
Number of renewal option terms | Term 2              
Operating lease, renewal term 5 years