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PROPERTY AND EQUIPMENT - Components of Property and Equipment, net (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 122,152	$ 105,258
Less: accumulated depreciation	(81,754)	(70,975)
Property and equipment, net	40,398	34,283
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	52,335	42,162
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	30,211	25,147
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	10,572	8,524
Computer software purchased
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,415	7,775
Computer software developed for internal use
Property, Plant and Equipment [Line Items]
Property and equipment, gross	18,542	17,606
Fixed assets in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,077	$ 4,044

X

- Definition

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

+ References

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-Publisher FASB
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-SubTopic 10
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- Definition

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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