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Fixed Assets, Net (Tables) | 6 Months Ended
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Jun. 30, 2021
Property, Plant and Equipment [Abstract] |
Components of Fixed Assets, Net | Fixed assets, net consisted of the following (in thousands):
| June 30, 2021 |  | December 31, 2020
Computer and communications equipment | $ | 92,751 |  |  | $ | 92,565 |
Software, including software development costs | 265,770 |  |  | 259,439 |
Leasehold improvements and other fixed assets | 106,780 |  |  | 120,951 |
| 465,301 |  |  | 472,955 |
Less: accumulated depreciation and amortization | (260,770) |  |  | (258,173) |
Fixed assets, net¹ | $ | 204,531 |  |  | $ | 214,782 |
___________________________ 1 Excludes Fixed assets, net of $8,606 thousand classified as Assets held for sale.

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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