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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013
(Loss) income from domestic operations before income tax expense |  |  |  |  |  |  |  |  | $ (214,600) | $ 138,200 | $ 111,800
Income from foreign operations before income tax expense |  |  |  |  |  |  |  |  | 63,100 | 176,600 | 224,000
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (67,100) | 5,300 | 30,300
State |  |  |  |  |  |  |  |  | 2,600 | 3,300 | 9,900
Foreign |  |  |  |  |  |  |  |  | 37,200 | 46,300 | 59,700
Total current income tax (benefit) expense |  |  |  |  |  |  |  |  | (27,300) | 54,900 | 99,900
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (44,200) | 27,700 | 5,800
State |  |  |  |  |  |  |  |  | 1,200 | 5,600 | (10,600)
Foreign |  |  |  |  |  |  |  |  | (10,000) | (6,200) | (2,500)
Total deferred income tax (benefit) expense |  |  |  |  |  |  |  |  | (53,034) | 27,155 | (7,210)
Total income tax (benefit) expense | $ 16,100 | $ (8,500) | $ (75,800) | $ (12,100) | $ 29,600 | $ 13,700 | $ 15,200 | $ 23,500 | (80,237) | 82,024 | 92,578
Major elements contributing to the difference between the U.S. federal statutory rate of 35.0% and the effective tax rate |  |  |  |  |  |  |  |  |  |  |
Discrete benefit |  |  |  |  |  |  |  |  | (53,000) | 110,200 | 117,500
State income tax, net of federal benefit |  |  |  |  |  |  |  |  | (2,300) | 5,000 | 2,500
Exclusion of tax on non-controlling interests |  |  |  |  |  |  |  |  | (29,300) |  |
Income tax credits and incentives |  |  |  |  |  |  |  |  | (21,100) | (7,100) | (14,700)
Foreign tax rate differential |  |  |  |  |  |  |  |  | (14,000) | (22,500) | (9,900)
Change in uncertain tax positions |  |  |  |  |  |  |  |  | 6,500 | (4,500) | (7,300)
Valuation allowance |  |  |  |  |  |  |  |  | 30,000 | 6,300 | 1,600
Domestic production activities |  |  |  |  |  |  |  |  |  | (11,700) | (2,600)
Nondeductible transaction costs |  |  |  |  |  |  |  |  | 2,800 | 2,800 |
Other items, net |  |  |  |  |  |  |  |  | 100 | 3,500 | 5,500
Total income tax (benefit) expense | $ 16,100 | $ (8,500) | $ (75,800) | $ (12,100) | $ 29,600 | $ 13,700 | $ 15,200 | $ 23,500 | $ (80,237) | $ 82,024 | $ 92,578
Major elements contributing to the difference between the U.S. federal statutory rate of 35.0% and the effective tax rate |  |  |  |  |  |  |  |  |  |  |
Federal statutory rate (as a percent) |  |  |  |  |  |  |  |  | 35.00% | 35.00% | 35.00%
State income tax, net of federal benefit (as a percent) |  |  |  |  |  |  |  |  | 1.50% | 1.60% | 0.70%
Exclusion of tax on non-controlling interests (as a percent) |  |  |  |  |  |  |  |  | 19.30% |  |
U.S. income tax credits (as a percent) |  |  |  |  |  |  |  |  | 14.00% | (2.20%) | (4.30%)
Foreign tax rate differential (as a percent) |  |  |  |  |  |  |  |  | 9.30% | (7.20%) | (2.90%)
Change in uncertain tax positions (as a percent) |  |  |  |  |  |  |  |  | (4.30%) | (1.40%) | (2.20%)
Valuation allowance (as a percent) |  |  |  |  |  |  |  |  | (19.80%) | 2.00% | 0.50%
Domestic production activities (as a percent) |  |  |  |  |  |  |  |  |  | (3.70%) | (0.80%)
Nondeductible transaction costs (as a percent) |  |  |  |  |  |  |  |  | (1.90%) | 0.90% |
Other items, net (as a percent) |  |  |  |  |  |  |  |  | (0.10%) | 1.10% | 1.60%
Effective tax rate (as a percent) |  |  |  |  |  |  |  |  | 53.00% | 26.10% | 27.60%

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