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Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]    
2018   $ 4,780
2019   4,724
2020   4,548
2021   4,409
2022   4,409
Thereafter   14,666
Total   37,536
Goodwill, impairment loss $ 148,375 $ 148,375