Fair Value of Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Other assets	$ 18,795	$ 13,893
Strategic Investments [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Other assets	9,000	$ 6,700
2022 Notes [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value of notes	387,400
2025 Notes [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value of notes	$ 758,500