Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Sep. 30, 2010
Sep. 30, 2011
Income Taxes [Abstract]        
Effective tax rate (in hundredths) 34.20% 35.30% 35.80%  
Favorable impact of adjustments $ (606) $ (656)    
Effective tax rate, excluding favorable impact of adjustments (in hundredths) 34.90% 36.10%    
Federal statutory rate (in hundredths) 35.00%      
Unrecognized tax benefits that would impact effective tax rate 3,056   3,422  
Unrecognized tax benefits that could be recognized in the next 12 months 99      
Interest and penalties on tax uncertainties 561      
Total penalties and interest accrued $ 1,851     $ 2,412
United States - Federal [Member]
       
Income Tax Contingency [Line Items]        
Years subject to examination 2008 and forward      
United States - State [Member]
       
Income Tax Contingency [Line Items]        
Years subject to examination 2007 and forward      
Canada [Member]
       
Income Tax Contingency [Line Items]        
Years subject to examination 2006 and forward      
Europe [Member]
       
Income Tax Contingency [Line Items]        
Years subject to examination 2002 and forward      
United Kingdom [Member]
       
Income Tax Contingency [Line Items]        
Years subject to examination 2009 and forward      
Australia [Member]
       
Income Tax Contingency [Line Items]        
Years subject to examination 2006 and forward      
Asia [Member]
       
Income Tax Contingency [Line Items]        
Years subject to examination 2004 and forward