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Segment Information (Details 4) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Sep. 30, 2012
Long-lived assets - Property, plant and equipment    
Consolidated long-lived assets $ 571,529 $ 512,679
United States
   
Long-lived assets - Property, plant and equipment    
Consolidated long-lived assets 397,464 358,648
United Kingdom
   
Long-lived assets - Property, plant and equipment    
Consolidated long-lived assets 124,666 113,929
Netherlands
   
Long-lived assets - Property, plant and equipment    
Consolidated long-lived assets 13,768 10,101
Ireland
   
Long-lived assets - Property, plant and equipment    
Consolidated long-lived assets 5,486 4,782
Canada
   
Long-lived assets - Property, plant and equipment    
Consolidated long-lived assets 11,752 12,503
Other foreign countries
   
Long-lived assets - Property, plant and equipment    
Consolidated long-lived assets $ 18,393 $ 12,716