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Other (Income) Expense, Net (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2012
Mar. 31, 2011
Net (gain) loss on sales of assets $ (80) $ (11) $ (72) $ 1
Rent income (128) (126) (256) (307)
Amount of (Income) Expense Recognized in Earnings on Derivative 43 41 85 1,693
Other 3 (22) (2) (32)
Other (income) expense, net (732) (392) (1,226) 706
Derivatives in Foreign Currency Relationships [Member]
        
Amount of (Income) Expense Recognized in Earnings on Derivative 0     1,612
Investments in Deferred Compensation Plan [Member]
        
Net gain on investments in deferred compensation program $ (527) $ (233) $ (896) $ (568)