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Variable Interest Entities - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Oct. 30, 2019
Variable Interest Entity [Line Items]
Carrying amounts for assets relating to the variable interest	$ 6,547	$ 10,347
Carrying amounts for liabilities relating to the variable interest	$ 2,676	$ 4,512
Heuro Canada Incorporation | Variable Interest Entity
Variable Interest Entity [Line Items]
Carrying amounts for assets relating to the variable interest			$ 0
Carrying amounts for liabilities relating to the variable interest			$ 0

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