Schedule of Long-Lived Assets by Geographic Area (Detail) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets		$ 456,047	$ 449,369
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets		308,438	291,234
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	[1]	$ 147,609	$ 158,135

[1] As of December 31, 2021 and 2020, long-lived assets attributable to Singapore were $39.4 million and $62.5 million, respectively.