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Business Acquisitions, Goodwill and Intangible Assets (Details 2) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2014 USD ($) | Sep. 30, 2013 USD ($) | Sep. 30, 2012 USD ($) item | Sep. 30, 2011 USD ($)
Goodwill |  |  |  |
Number of reporting units | item |  |  | 2 |
Goodwill impairment |  |  | $ (336,000) |
Goodwill Impairment, net of tax |  |  | 317,200 |
Goodwill | $ 1,811,754 | $ 1,811,754 | 1,775,400 | $ 1,775,400
Changes in the carrying value of goodwill by reporting segment |  |  |  |
Goodwill at the beginning of the period | 1,811,754 |  | 1,775,400 |
Post-Acquisition Adjustments | 5,000 |  |  |
Foreign Exchange Impact | (31,300) | (36,200) |  |
Acquired | 151,800 | 72,600 |  |
Goodwill impairment |  |  | $ (336,000) |
Goodwill at the end of the period | 1,937,338 | 1,811,754 |  | $ 1,775,400
EMEA [Member] |  |  |  |
Goodwill |  |  |  |
Market multiple of revenue |  |  | 0.35 | 0.50
Carrying value before impairment |  |  | $ 345,500 |
Goodwill impairment |  |  | (155,000) |
Carrying value after impairment |  |  | 190,500 |
Changes in the carrying value of goodwill by reporting segment |  |  |  |
Goodwill impairment |  |  | (155,000) |
Unconsolidated Joint Ventures |  |  |  |
Goodwill |  |  |  |
Goodwill | 79,100 |  |  |
Changes in the carrying value of goodwill by reporting segment |  |  |  |
Goodwill at the end of the period | 79,100 |  |  |
Design and Consulting Services |  |  |  |
Goodwill |  |  |  |
Goodwill impairment |  |  | (155,000) |
Goodwill | 1,414,100 | 1,414,100 | 1,377,700 | $ 1,377,700
Changes in the carrying value of goodwill by reporting segment |  |  |  |
Goodwill at the beginning of the period | 1,414,100 |  | 1,377,700 |
Post-Acquisition Adjustments | 5,000 |  |  |
Foreign Exchange Impact | (31,300) | (36,200) |  |
Acquired | 91,400 | 72,600 |  |
Goodwill impairment |  |  | $ (155,000) |
Goodwill at the end of the period | 1,479,200 | 1,414,100 |  | $ 1,377,700
Construction Services |  |  |  |
Goodwill |  |  |  |
Goodwill | 216,500 | 216,500 |  |
Changes in the carrying value of goodwill by reporting segment |  |  |  |
Goodwill at the beginning of the period | 216,500 |  |  |
Acquired | 60,400 |  |  |
Goodwill at the end of the period | 276,900 | 216,500 |  |
Management Services |  |  |  |
Goodwill |  |  |  |
Market multiple of revenue |  |  | 0.35 | 0.50
Carrying value before impairment |  |  | $ 362,200 |
Goodwill impairment |  |  | (181,000) |
Carrying value after impairment |  |  | 181,200 |
Goodwill | 181,200 | 181,200 | 181,200 | $ 181,200
Changes in the carrying value of goodwill by reporting segment |  |  |  |
Goodwill at the beginning of the period | 181,200 |  | 181,200 |
Goodwill impairment |  |  | $ (181,000) |
Goodwill at the end of the period | $ 181,200 | $ 181,200 |  | $ 181,200

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