Fair Value Measurements - Schedule of Fair Value Measurement of Financial Assets and Liabilities on a Recurring Basis and Level of inputs used for Measurement (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Assets, Fair Value Disclosure [Abstract]
Total fair value	$ 957,794	$ 987,728
Liabilities, Fair Value Disclosure [Abstract]
Total fair value		138,102
Derivative [Member]
Liabilities, Fair Value Disclosure [Abstract]
Total fair value		138,102
Money Market Funds [Member]
Assets, Fair Value Disclosure [Abstract]
Total fair value	957,794	987,728
Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Total fair value	957,794	987,728
Liabilities, Fair Value Disclosure [Abstract]
Total fair value		90,487
Fair Value, Inputs, Level 1 [Member] | Derivative [Member]
Liabilities, Fair Value Disclosure [Abstract]
Total fair value		90,487
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Assets, Fair Value Disclosure [Abstract]
Total fair value	$ 957,794	987,728
Fair Value, Inputs, Level 3 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Total fair value		47,615
Fair Value, Inputs, Level 3 [Member] | Derivative [Member]
Liabilities, Fair Value Disclosure [Abstract]
Total fair value		$ 47,615