Annual report pursuant to Section 13 and 15(d)

Leases (Details)

v2.3.0.15
Leases (Details) (USD $)
12 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2009
Leases      
Percentage of leases based within United States 50.00%    
Percentage of leases extending beyond 2015 based within United States, minimum 85.00%    
Rent expense $ 32,000,000 $ 30,200,000 $ 24,500,000
Minimum future payments under leases      
2012 30,142,000    
2013 23,428,000    
2014 19,994,000    
2015 14,545,000    
2016 6,185,000    
Thereafter 7,396,000    
Total minimum lease payments $ 101,690,000