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Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total Cost	$ 73,450	$ 71,116
Less: Accumulated depreciation	(37,576)	(31,621)
Property and equipment, net of accumulated depreciation	35,874	39,495
Depreciation expense	6,500	6,800	$ 5,600
Computers and equipment
Property, Plant and Equipment [Line Items]
Total Cost	$ 6,768	7,105
Property, Plant and Equipment, Useful Life	5 years
Computer software
Property, Plant and Equipment [Line Items]
Total Cost	$ 5,377	4,112
Computer software | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Computer software | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total Cost	$ 12,267	11,780
Property, Plant and Equipment, Useful Life	7 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total Cost	$ 49,038	$ 48,119
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	14 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years

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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- Definition

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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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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