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Income Taxes (Details) (USD $) | 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 Taxes |  |  |  |  |  |  |  |  |  |  |
Income (loss) from domestic operations before income tax expense |  |  |  |  |  |  |  |  | $ 138,200,000 | $ 111,800,000 | $ (89,200,000)
Income from foreign operations before income tax expense |  |  |  |  |  |  |  |  | 176,600,000 | 224,000,000 | 106,700,000
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 5,300,000 | 30,300,000 | 29,300,000
State |  |  |  |  |  |  |  |  | 3,300,000 | 9,900,000 | 2,100,000
Foreign |  |  |  |  |  |  |  |  | 46,300,000 | 59,700,000 | 63,300,000
Total current income tax expense |  |  |  |  |  |  |  |  | 54,900,000 | 99,900,000 | 94,700,000
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 27,700,000 | 5,800,000 | (19,200,000)
State |  |  |  |  |  |  |  |  | 5,600,000 | (10,600,000) | 600,000
Foreign |  |  |  |  |  |  |  |  | (6,200,000) | (2,500,000) | (1,700,000)
Total deferred income tax (benefit) expense |  |  |  |  |  |  |  |  | 27,155,000 | (7,210,000) | (20,303,000)
Total income tax expense | 29,600,000 | 13,700,000 | 15,200,000 | 23,500,000 | 35,800,000 | 30,100,000 | 14,000,000 | 12,700,000 | 82,024,000 | 92,578,000 | 74,416,000
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 |  |  |  |  |  |  |  |  | 110,200,000 | 117,500,000 | 6,100,000
State income tax, net of federal benefit |  |  |  |  |  |  |  |  | 5,000,000 | 2,500,000 | 1,100,000
U.S. income tax credits |  |  |  |  |  |  |  |  | (3,500,000) | (10,800,000) | (2,900,000)
Foreign tax rate differential |  |  |  |  |  |  |  |  | (22,500,000) | (9,900,000) | (25,400,000)
Foreign Research and Experimentation credits |  |  |  |  |  |  |  |  | (3,600,000) | (3,900,000) | (5,800,000)
Goodwill impairment |  |  |  |  |  |  |  |  |  |  | 101,100,000
Change in uncertain tax positions |  |  |  |  |  |  |  |  | (4,500,000) | (7,300,000) | (4,100,000)
Valuation allowance |  |  |  |  |  |  |  |  | 6,300,000 | 1,600,000 | 500,000
Domestic production activities |  |  |  |  |  |  |  |  | (11,700,000) | (2,600,000) | (1,200,000)
Nondeductible transaction costs |  |  |  |  |  |  |  |  | 2,800,000 |  | 1,300,000
Other items, net |  |  |  |  |  |  |  |  | 3,500,000 | 5,500,000 | 3,700,000
Total income tax expense | $ 29,600,000 | $ 13,700,000 | $ 15,200,000 | $ 23,500,000 | $ 35,800,000 | $ 30,100,000 | $ 14,000,000 | $ 12,700,000 | $ 82,024,000 | $ 92,578,000 | $ 74,416,000
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 (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%

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