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Property and Equipment | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Property and Equipment | Property and Equipment The composition of property and equipment as of December 31, 2020 and 2021 is as follows (in thousands):
| December 31, 2020 |  | December 31, 2021 |  | Estimated useful life (years)
Land | $ | 7,138 |  |  | $ | 5,380 |  |  | — |
Buildings and improvements | 21,373 |  |  | 16,691 |  |  | 5-40
Furniture and office equipment | 77,337 |  |  | 65,054 |  |  | 5-7
Computer hardware | 15,684 |  |  | 20,175 |  |  | 3-7
Computer software | 183,015 |  |  | 199,635 |  |  | 3-10
Leasehold improvements | 65,719 |  |  | 71,633 |  |  | 3-15
Construction in progress | 15,517 |  |  | 9,246 |  |  | — |
| 385,783 |  |  | 387,814 |  |  |
Accumulated depreciation and amortization | (226,929) |  |  | (237,225) |  |  |
| $ | 158,854 |  |  | $ | 150,589 |  |  |
Construction in progress includes costs associated with the construction and renovation of facilities and the development of information technology applications.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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