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Property and Equipment Property and Equipment (Tables) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Property, Plant and Equipment [Line Items] |  |
Land and building | $ 882 | $ 947
Leasehold Improvements, Gross | 88,012 | 86,625
Machinery and Equipment, Gross | 6,340 | 6,257
Furniture and Fixtures, Gross | 11,201 | 11,354
Computer equipment | 71,601 | 61,732
Construction in Progress, Gross | 744 | 9,035
Property, Plant and Equipment, Gross | 178,780 | 175,950
Tangible Asset Impairment Charges | (14,712) |
Impairment charges | 14,712 | 0
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment | (120,800) | (110,446)
Property and equipment, net | $ 43,268 | $ 65,504
Machinery and Equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 10 years |
Furniture and Fixtures [Member] | Minimum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 3 years |
Furniture and Fixtures [Member] | Maximum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 5 years |
Computer Equipment [Member] | Minimum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 3 years |
Computer Equipment [Member] | Maximum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 10 years |
Building |  |
Property, Plant and Equipment [Line Items] |  |
Property, Plant and Equipment, Useful Life | 27 years 6 months |

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