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v3.20.2

Income Taxes - Schedule Of Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
--- | --- | --- | --- | ---
Deferred tax assets: |  |  |  |
Net operating loss carryforwards | $ 61,495 | $ 26,462 |  |
Foreign tax credits | 8,074 | 0 |  |
Capitalized research and development | 30,109 | 34,560 |  |
Pension benefits | 14,370 | 14,838 |  |
Prepaid expenses | 13,579 | 41,739 |  |
Deferred revenue | 6,021 | 9,899 |  |
Stock-based compensation | 13,630 | 12,306 |  |
Other reserves not currently deductible | 15,130 | 20,986 |  |
Amortization of intangible assets | 162,426 | 168,376 |  |
Research and development and other tax credits | 70,695 | 49,995 |  |
Lease liabilities | 52,224 | 0 |  |
Fixed assets | 47,457 | 45,450 |  |
Capital loss carryforward | 35,851 | 31,248 |  |
Deferred interest | 0 | 10,864 |  |
Other | 1,849 | 1,623 |  |
Gross deferred tax assets | 532,910 | 468,346 |  |
Valuation allowance | (205,423) | (177,663) | $ (141,950) | $ (279,683)
Total deferred tax assets | 327,487 | 290,683 |  |
Deferred tax liabilities: |  |  |  |
Acquired intangible assets not deductible | (65,894) | (42,554) |  |
Lease assets | (35,885) | 0 |  |
Pension prepayments | (1,155) | (2,532) |  |
Deferred revenue | (594) | (19,312) |  |
Depreciation | (7,481) | 0 |  |
Unbilled accounts receivable | (12,699) | (31,005) |  |
Deferred income | (5,821) | (19,040) |  |
Prepaid commissions | (17,124) | (17,423) |  |
Other | (2,302) | (1,866) |  |
Total deferred tax liabilities | (148,955) | (133,732) |  |
Net deferred tax assets | $ 178,532 | $ 156,951 |  |

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