Property and Equipment, net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Owned Assets:
Owned assets, gross	$ 305,150	$ 299,361
Less: Accumulated depreciation and amortization	(222,870)	(213,699)
Owned assets, net	82,280	85,662
Right-of-use assets under finance leases:*
Finance lease, right of use asset, gross	2,432	2,685
Less: Accumulated depreciation and amortization	(2,063)	(2,339)
Property and equipment, net	369	346
Property and equipment, net	$ 82,649	$ 86,008
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property and equipment, net	Property and equipment, net
Network equipment and computers
Owned Assets:
Owned assets, gross	$ 123,117	$ 116,023
Right-of-use assets under finance leases:*
Finance lease, right of use asset, gross	86	91
Software
Owned Assets:
Owned assets, gross	105,924	101,884
Leasehold improvements
Owned Assets:
Owned assets, gross	44,448	46,401
Right-of-use assets under finance leases:*
Finance lease, right of use asset, gross	1,061	1,229
Office furniture and equipment
Owned Assets:
Owned assets, gross	20,892	22,302
Right-of-use assets under finance leases:*
Finance lease, right of use asset, gross	685	787
Motor vehicles
Owned Assets:
Owned assets, gross	595	693
Right-of-use assets under finance leases:*
Finance lease, right of use asset, gross	$ 600	578
Buildings
Owned Assets:
Estimated useful lives	30 years
Owned assets, gross	$ 1,007	1,070
Land
Owned Assets:
Owned assets, gross	659	700
Capital work in progress
Owned Assets:
Owned assets, gross	$ 8,508	$ 10,288
Minimum | Network equipment and computers
Owned Assets:
Estimated useful lives	3 years
Minimum | Software
Owned Assets:
Estimated useful lives	2 years
Minimum | Leasehold improvements
Owned Assets:
Estimated useful lives	3 years
Minimum | Office furniture and equipment
Owned Assets:
Estimated useful lives	3 years
Minimum | Motor vehicles
Owned Assets:
Estimated useful lives	2 years
Maximum | Network equipment and computers
Owned Assets:
Estimated useful lives	5 years
Maximum | Software
Owned Assets:
Estimated useful lives	5 years
Maximum | Leasehold improvements
Owned Assets:
Estimated useful lives	8 years
Maximum | Office furniture and equipment
Owned Assets:
Estimated useful lives	8 years
Maximum | Motor vehicles
Owned Assets:
Estimated useful lives	5 years