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Restructuring Charges (Narrative) (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Sep. 30, 2014
USD ($)
employees
Sep. 30, 2015
USD ($)
employee
Sep. 30, 2014
USD ($)
Sep. 30, 2013
USD ($)
employees
Restructuring Cost and Reserve [Line Items]        
Restructuring charges   $ 43,409 $ 28,406 $ 52,197
Restructuring Charges, Gross       52,448
Restructuring Reserve, Accrual Adjustment       200
Severance costs       $ 51,000
Restructuring and Related Cost, Number of Positions Eliminated | employee   411    
Number of employees associated with costs | employees 283     553
Employee Severance And Related Benefits        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges   $ 41,997 27,918 $ 50,874
Facility Closures and Other Costs [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges   1,412 488 1,323
Operating Leases, Rent Expense, Minimum Rentals   2,300    
Operating Leases, Rent Expense, Sublease Rentals   $ (900)    
Restructuring Plan 2014        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges $ 26,825      
Restructuring Plan 2013        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges     $ 1,581  
Restructuring Plan 2013 | Facility Closures and Other Costs [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges       $ 1,494