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Accrued Liabilities (Restructuring and Other Charges) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2012
Mar. 31, 2012
Sep. 30, 2011
Accrued restructuring charges, beginning balance $ 2,760 $ 2,909  
Payments (66) (220)  
Non-cash adjustments 6 12  
Foreign currency exchange rates 1 0  
Accrued restructuring charges, ending balance 2,701 2,701  
Non-current accrued restructuring charges 272 272 420
Non-Acquisition [Member]
     
Accrued restructuring charges, beginning balance 261 365  
Payments (21) (130)  
Non-cash adjustments 6 12  
Foreign currency exchange rates 1 0  
Accrued restructuring charges, ending balance 247 247  
Business Acquisitions [Member]
     
Accrued restructuring charges, beginning balance 2,499 2,544  
Payments (45) (90)  
Non-cash adjustments 0 0  
Foreign currency exchange rates 0 0  
Accrued restructuring charges, ending balance $ 2,454 $ 2,454