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Non-cash Financing and Investing Activities - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Supplemental Disclosure Of Non Cash Investing And Financing Information [Line Items]      
Non-cash investing activities   $ 0  
Non cash financing activities related to financing lease liabilities $ 19,891,000    
Non-cash financing activity   $ 0 $ 0
Common Class A [Member]      
Supplemental Disclosure Of Non Cash Investing And Financing Information [Line Items]      
Issuance of shares related to acquisition     163,137
Issuance of shares related to acquisition, value     $ 12,282,000