Property and Equipment, net - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Owned Assets:
Owned assets, gross	$ 299,361	$ 284,033
Less: Accumulated depreciation and amortization	(213,699)	(191,629)
Property and equipment, net	85,662	92,404
Right-of-use assets under finance leases:
Right of use assets under finance leases, gross	2,685	1,853
Less: Accumulated depreciation and amortization	(2,339)	(1,382)
Property and equipment, net	346	471
Property and equipment, net	$ 86,008	$ 92,875
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property and equipment, net	Property and equipment, net
Network equipment and computers
Owned Assets:
Owned assets, gross	$ 116,023	$ 107,016
Right-of-use assets under finance leases:
Right of use assets under finance leases, gross	$ 91	93
Network equipment and computers | Minimum
Owned Assets:
Estimated useful lives	3 years
Network equipment and computers | Maximum
Owned Assets:
Estimated useful lives	5 years
Software
Owned Assets:
Owned assets, gross	$ 101,884	99,708
Software | Minimum
Owned Assets:
Estimated useful lives	3 years
Software | Maximum
Owned Assets:
Estimated useful lives	5 years
Leasehold improvements
Owned Assets:
Owned assets, gross	$ 46,401	48,052
Right-of-use assets under finance leases:
Right of use assets under finance leases, gross	$ 1,229	817
Leasehold improvements | Minimum
Owned Assets:
Estimated useful lives	3 years
Leasehold improvements | Maximum
Owned Assets:
Estimated useful lives	8 years
Office furniture and equipment
Owned Assets:
Owned assets, gross	$ 22,302	22,210
Right-of-use assets under finance leases:
Right of use assets under finance leases, gross	$ 787	255
Office furniture and equipment | Minimum
Owned Assets:
Estimated useful lives	3 years
Office furniture and equipment | Maximum
Owned Assets:
Estimated useful lives	8 years
Motor vehicles
Owned Assets:
Owned assets, gross	$ 693	599
Right-of-use assets under finance leases:
Right of use assets under finance leases, gross	$ 578	688
Motor vehicles | Minimum
Owned Assets:
Estimated useful lives	2 years
Motor vehicles | Maximum
Owned Assets:
Estimated useful lives	5 years
Buildings
Owned Assets:
Estimated useful lives	30 years
Owned assets, gross	$ 1,070	1,089
Land
Owned Assets:
Owned assets, gross	700	712
Capital work in progress
Owned Assets:
Owned assets, gross	$ 10,288	$ 4,647