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Intangible assets and goodwill - Additional Information (Detail)
$ in Thousands
Dec. 31, 2020
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
Estimated amortization expense for intangibles in year 1 $ 4,353
Estimated amortization expense for intangibles in year 2 4,194
Estimated amortization expense for intangibles in year 3 4,194
Estimated amortization expense for intangibles in year 4 4,194
Estimated amortization expense for intangibles in year 5 $ 4,194