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Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2016 | Sep. 30, 2015
--- | --- | ---
Deferred tax assets: |  |
Deferred revenue | $ 57,361 | $ 69,680
Employee compensation and benefits | 80,312 | 75,401
Intangible assets, computer software and intellectual property | 14,840 | 14,937
Tax credits, net capital and operating loss carryforwards | 168,641 | 114,709
Other | 68,073 | 68,300
Total deferred tax assets | 389,227 | 343,027
Valuation allowances | (96,870) | (112,165)
Total deferred tax assets, net | 292,357 | 230,862
Deferred tax liabilities: |  |
Anticipated withholdings on subsidiaries' earnings | (66,628) | (58,774)
Intangible assets, computer software and intellectual property | (146,848) | (118,650)
Other | (26,228) | (19,886)
Total deferred tax liabilities | (239,704) | (197,310)
Net deferred tax assets | $ 52,653 | $ 33,552

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