PROPERTY AND EQUIPMENT, NET (Schedule of Components of Property and Equipment and Depreciation) (Details) $ in Thousands		12 Months Ended
	Nov. 17, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 440,443	$ 402,862
Less: accumulated depreciation and amortization		(167,095)	(166,648)
Total		273,348	236,214	$ 169,533
Depreciation and amortization expense		69,000	65,500	50,500
Payments to acquire an office building		81,629	111,501	68,793
Software Licenses
Property, Plant and Equipment [Line Items]
Purchase price		66,100
Payment to acquire assets		13,300
Deferred contingent consideration		$ 52,800
Software Licenses | Discount rate
Property, Plant and Equipment [Line Items]
Discount rate		0.0520
Computer hardware
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		3 years
Property and equipment, gross		$ 157,283	167,546
Purchased computer software
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		5 years
Property and equipment, gross		$ 99,414	33,649
Buildings
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		44 years
Property and equipment, gross		$ 54,627	55,388
Leasehold improvements
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		9 years
Property and equipment, gross		$ 32,949	37,828
Furniture, fixture and other equipment
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		7 years
Property and equipment, gross		$ 22,153	31,961
Office equipment
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		7 years
Property and equipment, gross		$ 19,039	22,881
Land improvements
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		18 years
Property and equipment, gross		$ 2,137	2,137
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross		1,339	1,339
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross		51,502	50,133
Minsk, Belarus | Buildings
Property, Plant and Equipment [Line Items]
Leased building, before accumulated depreciation		3,600	3,300
Leased building, accumulated depreciation		300	200
Depreciation expense		100	100
Ukraine
Property, Plant and Equipment [Line Items]
Total		70,183	$ 78,289	$ 30,980
Ukraine | Computer hardware
Property, Plant and Equipment [Line Items]
Total		11,500
Ukraine | Buildings
Property, Plant and Equipment [Line Items]
Total		70,200
Ukraine | Leasehold improvements
Property, Plant and Equipment [Line Items]
Total		1,000
Ukraine | Furniture, fixture and other equipment
Property, Plant and Equipment [Line Items]
Total		6,300
Ukraine | Construction in progress
Property, Plant and Equipment [Line Items]
Total		$ 51,400
Payments to acquire an office building	$ 50,100