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Business Acquisitions, Goodwill and Intangible Assets (Details 4) (USD $)
 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Estimated amortization expense of intangible assets for the remainder of fiscal 2013 and for the succeeding years    
2015 $ 26,500,000  
2016 17,500,000  
2017 13,200,000  
2018 9,900,000  
2019 9,000,000  
Thereafter 14,100,000  
Intangible Assets, Net 90,238,000 83,149,000
Gross Amount 280,900,000 249,800,000
Accumulated Amortization (190,700,000) (166,700,000)
Intangible Assets, Net 90,238,000 83,149,000
Amortization expense 24,000,000 21,200,000
Contractual Rights [Member]
    
Estimated amortization expense of intangible assets for the remainder of fiscal 2013 and for the succeeding years    
Intangible Assets, Net 12,600,000 5,500,000
Gross Amount 110,000,000 94,900,000
Accumulated Amortization (97,400,000) (89,400,000)
Intangible Assets, Net 12,600,000 5,500,000
Contractual Rights [Member] | Minimum [Member]
    
Estimated amortization expense of intangible assets for the remainder of fiscal 2013 and for the succeeding years    
Amortization Period 1 year  
Contractual Rights [Member] | Maximum
    
Estimated amortization expense of intangible assets for the remainder of fiscal 2013 and for the succeeding years    
Amortization Period 5 years  
Customer Relationships [Member]
    
Estimated amortization expense of intangible assets for the remainder of fiscal 2013 and for the succeeding years    
Intangible Assets, Net 76,200,000 77,600,000
Gross Amount 161,600,000 147,100,000
Accumulated Amortization (85,400,000) (69,500,000)
Intangible Assets, Net 76,200,000 77,600,000
Amortization Period 10 years  
Trademarks and Trade Names [Member]
    
Estimated amortization expense of intangible assets for the remainder of fiscal 2013 and for the succeeding years    
Intangible Assets, Net 1,400,000  
Gross Amount 9,300,000 7,800,000
Accumulated Amortization (7,900,000) (7,800,000)
Intangible Assets, Net $ 1,400,000  
Amortization Period 2 years