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Segment Information (Details 3) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Sep. 30, 2011
Long-lived assets-Property, plant and equipment    
Consolidated long-lived assets $ 512,679 $ 474,572
United States
   
Long-lived assets-Property, plant and equipment    
Consolidated long-lived assets 358,648 333,863
United Kingdom
   
Long-lived assets-Property, plant and equipment    
Consolidated long-lived assets 113,929 103,760
Canada
   
Long-lived assets-Property, plant and equipment    
Consolidated long-lived assets 12,503 12,500
Netherlands
   
Long-lived assets-Property, plant and equipment    
Consolidated long-lived assets 10,101 7,635
Ireland
   
Long-lived assets-Property, plant and equipment    
Consolidated long-lived assets 4,782 4,716
Other foreign countries
   
Long-lived assets-Property, plant and equipment    
Consolidated long-lived assets $ 12,716 $ 12,098