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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Income (loss) from domestic operations before income tax expense |  |  |  |  |  |  |  |  | $ 138,200 | $ 111,800 | $ (89,200)
Income from foreign operations before income tax expense |  |  |  |  |  |  |  |  | 176,600 | 224,000 | 106,700
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 5,300 | 30,300 | 29,300
State |  |  |  |  |  |  |  |  | 3,300 | 9,900 | 2,100
Foreign |  |  |  |  |  |  |  |  | 46,300 | 59,700 | 63,300
Total current income tax expense |  |  |  |  |  |  |  |  | 54,900 | 99,900 | 94,700
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 27,700 | 5,800 | (19,200)
State |  |  |  |  |  |  |  |  | 5,600 | (10,600) | 600
Foreign |  |  |  |  |  |  |  |  | (6,200) | (2,500) | (1,700)
Total deferred income tax (benefit) expense |  |  |  |  |  |  |  |  | 27,155 | (7,210) | (20,303)
Total income tax expense | $ 29,600 | $ 13,700 | $ 15,200 | $ 23,500 | $ 35,800 | $ 30,100 | $ 14,000 | $ 12,700 | 82,024 | 92,578 | 74,416
Major elements contributing to the difference between the U.S. federal statutory rate of 35.0% and the effective tax rate |  |  |  |  |  |  |  |  |  |  |
Discrete benefit |  |  |  |  |  |  |  |  | 110,200 | 117,500 | 6,100
State income tax, net of federal benefit |  |  |  |  |  |  |  |  | 5,000 | 2,500 | 1,100
U.S. income tax credits |  |  |  |  |  |  |  |  | (3,500) | (10,800) | (2,900)
Foreign tax rate differential |  |  |  |  |  |  |  |  | (22,500) | (9,900) | (25,400)
Foreign Research and Experimentation credits |  |  |  |  |  |  |  |  | (3,600) | (3,900) | (5,800)
Goodwill impairment |  |  |  |  |  |  |  |  |  |  | 101,100
Change in uncertain tax positions |  |  |  |  |  |  |  |  | (4,500) | (7,300) | (4,100)
Valuation allowance |  |  |  |  |  |  |  |  | 6,300 | 1,600 | 500
Domestic production activities |  |  |  |  |  |  |  |  | (11,700) | (2,600) | (1,200)
Nondeductible transaction costs |  |  |  |  |  |  |  |  | 2,800 |  | 1,300
Other items, net |  |  |  |  |  |  |  |  | 3,500 | 5,500 | 3,700
Total income tax expense | $ 29,600 | $ 13,700 | $ 15,200 | $ 23,500 | $ 35,800 | $ 30,100 | $ 14,000 | $ 12,700 | $ 82,024 | $ 92,578 | $ 74,416
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) |  |  |  |  |  |  |  |  | 1.60% | 0.70% | 6.30%
U.S. income tax credits (as a percent) |  |  |  |  |  |  |  |  | (1.10%) | (3.20%) | (16.60%)
Foreign tax rate differential (as a percent) |  |  |  |  |  |  |  |  | (7.20%) | (2.90%) | (145.10%)
Foreign Research and Experimentation credits (as a percent) |  |  |  |  |  |  |  |  | (1.10%) | (1.10%) | (33.30%)
Goodwill impairment (as a percent) |  |  |  |  |  |  |  |  |  |  | 578.30%
Change in uncertain tax positions (as a percent) |  |  |  |  |  |  |  |  | (1.40%) | (2.20%) | (23.40%)
Valuation allowance (as a percent) |  |  |  |  |  |  |  |  | 2.00% | 0.50% | 2.70%
Domestic production activities (as a percent) |  |  |  |  |  |  |  |  | (3.70%) | (0.80%) | (6.80%)
Nondeductible transaction costs (as a percent) |  |  |  |  |  |  |  |  | 0.90% |  | 7.60%
Other items, net (as a percent) |  |  |  |  |  |  |  |  | 1.10% | 1.60% | 21.00%
Effective tax rate (as a percent) |  |  |  |  |  |  |  |  | 26.10% | 27.60% | 425.70%
Parent |  |  |  |  |  |  |  |  |  |  |
Deferred: |  |  |  |  |  |  |  |  |  |  |
Total income tax expense |  |  |  |  |  |  |  |  | $ (28,600) | $ (44,100) | $ (22,400)
Major elements contributing to the difference between the U.S. federal statutory rate of 35.0% and the effective tax rate |  |  |  |  |  |  |  |  |  |  |
Total income tax expense |  |  |  |  |  |  |  |  | $ (28,600) | $ (44,100) | $ (22,400)

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