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
 6 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Sep. 30, 2013
Income Taxes [Abstract]      
Effective tax rate (in hundredths) 35.90% 35.00%  
Federal statutory rate (in hundredths) 35.00%    
Unrecognized tax benefits that would impact effective tax rate $ 4,386   $ 4,516
Interest and penalties on tax uncertainties 178    
Total penalties and interest accrued $ 2,579   $ 2,401
United States - Federal [Member]
      
Income Tax Contingency [Line Items]      
Years under examination 2010 and forward    
United States - State [Member]
      
Income Tax Contingency [Line Items]      
Years under examination 2009 and forward    
Canada [Member]
      
Income Tax Contingency [Line Items]      
Years under examination 2008 and forward    
Europe [Member]
      
Income Tax Contingency [Line Items]      
Years under examination 2008 and forward    
United Kingdom [Member]
      
Income Tax Contingency [Line Items]      
Years under examination 2012 and forward    
Australia [Member]
      
Income Tax Contingency [Line Items]      
Years under examination 2009 and forward    
Asia [Member]
      
Income Tax Contingency [Line Items]      
Years under examination 2008 and forward