PROPERTY, EQUIPMENT AND SOFTWARE, NET Depreciation and Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Capitalized Computer Software, Amortization	$ 56,600	$ 53,900	$ 57,000
Depreciation and amortization of property, equipment and software	91,410	101,330	114,795
Capital Leases, Income Statement, Amortization Expense	18,900	30,200	35,200
Selling, General and Administrative Expenses
Property, Plant and Equipment [Line Items]
Depreciation and amortization of property, equipment and software	56,027	64,761	78,157
Service | Cost of Sales
Property, Plant and Equipment [Line Items]
Depreciation and amortization of property, equipment and software	28,917	28,102	26,738
Product | Cost of Sales
Property, Plant and Equipment [Line Items]
Depreciation and amortization of property, equipment and software	$ 6,466	$ 8,467	$ 9,900