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Property and Equipment | 12 Months Ended
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Sep. 30, 2021
Property Plant And Equipment [Abstract] |
Property and Equipment | 5. Property and Equipment Property and equipment consisted of the following:
(in thousands) |  | September 30, |
|  | 2021 |  |  | 2020 |
Computer hardware and software |  | $ | 352,704 |  |  | $ | 330,392 |
Furniture and fixtures |  |  | 30,568 |  |  |  | 30,251 |
Leasehold improvements |  |  | 94,959 |  |  |  | 99,883 |
Gross property and equipment |  |  | 478,231 |  |  |  | 460,526 |
Accumulated depreciation and amortization |  |  | (377,994 | ) |  |  | (359,027 | )
Net property and equipment |  | $ | 100,237 |  |  | $ | 101,499 |
Depreciation expense was $26.1 million, $24.7 million and $26.7 million in 2021, 2020 and 2019, respectively.

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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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