Investments - Summary of Financial Information for Equity Method Investments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 304,878		$ 304,878		$ 259,027
Current liabilities	133,529		133,529		92,427
Gross profit	3,739	$ 15,853	9,190	$ 33,511
Equity Method Investments [Member]
Schedule Of Equity Method Investments [Line Items]
Revenue			4,854
Gross profit			2,032
Net loss			(8,991)	$ (3,160)
Equity Method Investments [Member] | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	12,346		12,346		13,942
Noncurrent assets	5,205		5,205		4,987
Current liabilities	$ 4,965		$ 4,965		$ 1,561