Segment Information - 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	$ 268,176	$ 289,806
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	167,870	182,776
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	13,480	13,949
Total Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	181,350	196,725
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	19,563	19,678
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	34,240	33,561
Total EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	53,803	53,239
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	1,150	1,896
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	31,873	37,946
Total Asia & Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 33,023	$ 39,842