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Income Taxes - Disclosures (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Income (loss) from domestic operations before income tax expense |  |  |  |  |  |  |  |  | $ 51,600 | $ (214,600) | $ 138,200
Income from foreign operations before income tax expense |  |  |  |  |  |  |  |  | 74,000 | 63,100 | 176,600
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 33,700 | (67,100) | 5,300
State |  |  |  |  |  |  |  |  | 12,400 | 2,600 | 3,300
Foreign |  |  |  |  |  |  |  |  | 26,100 | 37,200 | 46,300
Total current income tax (benefit) expense |  |  |  |  |  |  |  |  | 72,200 | (27,300) | 54,900
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (63,400) | (44,200) | 27,700
State |  |  |  |  |  |  |  |  | (5,400) | 1,200 | 5,600
Foreign |  |  |  |  |  |  |  |  | (41,300) | (10,000) | (6,200)
Total deferred income tax (benefit) expense |  |  |  |  |  |  |  |  | (110,122) | (53,034) | 27,155
Total income tax (benefit) expense | $ (14,300) | $ (35,100) | $ 12,200 | $ (700) | $ 16,100 | $ (8,500) | $ (75,800) | $ (12,100) | (37,917) | (80,237) | 82,024
Major elements contributing to the difference between the U.S. federal statutory rate of 35.0% and the effective tax rate |  |  |  |  |  |  |  |  |  |  |
Tax at federal statutory rate |  |  |  |  |  |  |  |  | 43,900 | (53,000) | 110,200
State income tax, net of federal benefit |  |  |  |  |  |  |  |  | 5,600 | (2,300) | 5,000
Valuation allowance |  |  |  |  |  |  |  |  | (54,800) | 30,000 | 6,300
Exclusion of tax on non-controlling interests |  |  |  |  |  |  |  |  | (24,700) | (29,300) |
Income tax credits and incentives |  |  |  |  |  |  |  |  | (24,600) | (21,200) | (18,800)
Foreign tax rate differential |  |  |  |  |  |  |  |  | (19,700) | (24,800) | (38,800)
Tax exempt income |  |  |  |  |  |  |  |  | (17,600) | (13,200) | (1,900)
Change in uncertain tax positions |  |  |  |  |  |  |  |  | (5,000) | 6,600 | (4,500)
Change in tax rates |  |  |  |  |  |  |  |  | 34,600 |  |
Foreign residual income |  |  |  |  |  |  |  |  | 17,800 | 20,100 | 16,900
Nondeductible costs |  |  |  |  |  |  |  |  | 6,100 | 2,800 | 2,800
Nondeductible transaction costs |  |  |  |  |  |  |  |  |  | 2,800 | 2,800
Other items, net |  |  |  |  |  |  |  |  | 500 | 1,200 | 2,000
Total income tax (benefit) expense | $ (14,300) | $ (35,100) | $ 12,200 | $ (700) | $ 16,100 | $ (8,500) | $ (75,800) | $ (12,100) | $ (37,917) | $ (80,237) | $ 82,024
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) |  |  |  |  |  |  |  |  | 4.50% | 1.50% | 1.60%
Valuation allowance (as a percent) |  |  |  |  |  |  |  |  | (43.60%) | (19.80%) | 2.00%
Exclusion of tax on non-controlling interests (as a percent) |  |  |  |  |  |  |  |  | (19.70%) | 19.30% |
Income tax credits and incentives (as a percent) |  |  |  |  |  |  |  |  | (19.60%) | 14.00% | (6.00%)
Foreign tax rate differential (as a percent) |  |  |  |  |  |  |  |  | (15.70%) | 16.40% | (12.30%)
Tax exempt income (as a percent) |  |  |  |  |  |  |  |  | (14.00%) | 8.70% | (0.60%)
Change in uncertain tax positions (as a percent) |  |  |  |  |  |  |  |  | (4.00%) | (4.30%) | (1.40%)
Change in tax rates (as a percent) |  |  |  |  |  |  |  |  | 27.60% |  |
Foreign residual income (as a percent) |  |  |  |  |  |  |  |  | 14.20% | (13.30%) | 5.40%
Nondeductible costs (as a percent) |  |  |  |  |  |  |  |  | 4.80% | (1.80%) | 0.90%
Nondeductible transaction costs (as a percent) |  |  |  |  |  |  |  |  |  | (1.80%) | 0.90%
Other items, net (as a percent) |  |  |  |  |  |  |  |  | 0.30% | (0.90%) | 0.60%
Total income tax expense (as a percent) |  |  |  |  |  |  |  |  | (30.20%) | 53.00% | 26.10%
Tax benefit recognized related to previously expired and subsequently extended U.S. tax incentives and credits |  |  |  |  |  |  |  |  | $ 10,100 | $ 19,400 |

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