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Derivative Instruments and Hedging Activities (Narrative) (Details)
In Thousands, unless otherwise specified
3 Months Ended
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Sep. 30, 2010
USD ($)
Sep. 30, 2010
EUR (€)
Derivative Instruments and Hedging Activities        
Foreign currency exchange rate contract     $ 52,549 € 39,000
Gain on the fair market value of foreign currency exchange rate contract     579  
Realized loss on settlement of forward contract   1,033    
Net unrecognized losses on terminated derivative instruments expected to be reclassified to earnings $ 171      
Term of gain or loss recognition in interest expense on terminated derivatives recorded in OCI twelve