PROPERTY AND EQUIPMENT, NET (Schedule of Components of Property and Equipment and Depreciation) (Details) $ in Thousands		12 Months Ended
	Nov. 17, 2021 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 432,579	$ 440,443
Less: accumulated depreciation and amortization		(197,526)	(167,095)
Total		235,053	273,348	$ 236,214
Depreciation and amortization expense		68,200	69,000	65,500
Payments to acquire an office building		28,415	81,629	111,501
Software Licenses
Property, Plant and Equipment [Line Items]
Purchase price		26,700	66,100
Payment to acquire assets		6,800	13,300
Deferred contingent consideration		19,900	$ 52,800
Decrease in deferred payments for asset acquisition		21,400
Derecognition of intangible assets		$ 20,800
Software Licenses | Discount rate
Property, Plant and Equipment [Line Items]
Discount rate		0.055	0.052
Computer hardware
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		4 years
Property and equipment, gross		$ 155,991	$ 157,283
Purchased computer software
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		5 years
Property and equipment, gross		$ 88,644	99,414
Buildings
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		45 years
Property and equipment, gross		$ 54,899	54,627
Leasehold improvements
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		7 years
Property and equipment, gross		$ 37,189	32,949
Furniture, fixture and other equipment
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		7 years
Property and equipment, gross		$ 22,583	22,153
Office equipment
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		7 years
Property and equipment, gross		$ 18,315	19,039
Land improvements
Property, Plant and Equipment [Line Items]
Weighted Average Useful Life (in years)		18 years
Property and equipment, gross		$ 2,142	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		51,477	51,502
Minsk, Belarus | Buildings
Property, Plant and Equipment [Line Items]
Leased building, before accumulated depreciation		5,900	3,600
Leased building, accumulated depreciation		1,900	300
Depreciation expense		500	100	100
Ukraine
Property, Plant and Equipment [Line Items]
Total		62,653	$ 70,183	$ 78,289
Ukraine | Computer hardware
Property, Plant and Equipment [Line Items]
Total		5,900
Ukraine | Buildings
Property, Plant and Equipment [Line Items]
Total		62,700
Ukraine | Leasehold improvements
Property, Plant and Equipment [Line Items]
Total		1,100
Ukraine | Furniture, fixture and other equipment
Property, Plant and Equipment [Line Items]
Total		4,200
Ukraine | Construction in progress
Property, Plant and Equipment [Line Items]
Total		$ 51,500
Payments to acquire an office building	$ 50,100