Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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PROPERTY AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 300,384		$ 300,384		$ 267,311
Less: Accumulated depreciation and amortization	(166,350)		(166,350)		(124,909)
Property and equipment, net	134,034		134,034		142,402
Depreciation and amortization expense	15,300	$ 11,700	45,600	$ 29,200
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	108,980		108,980		107,611
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	91,464		91,464		80,093
Capitalized software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	76,656		76,656		58,908
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 23,284		$ 23,284		$ 20,699