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Property and Equipment | 12 Months Ended
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Sep. 30, 2020
Property Plant And Equipment [Abstract] |
Property and Equipment | 5. Property and Equipment Property and equipment consisted of the following:
(in thousands) |  | September 30, |
|  | 2020 |  |  | 2019 |
Computer hardware and software |  | $ | 330,392 |  |  | $ | 313,967 |
Furniture and fixtures |  |  | 30,251 |  |  |  | 28,445 |
Leasehold improvements |  |  | 99,883 |  |  |  | 97,657 |
Gross property and equipment |  |  | 460,526 |  |  |  | 440,069 |
Accumulated depreciation and amortization |  |  | (359,027 | ) |  |  | (334,538 | )
Net property and equipment |  | $ | 101,499 |  |  | $ | 105,531 |
Depreciation expense was $24.7 million, $26.7 million and $29.4 million in 2020, 2019 and 2018, 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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