Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

v2.4.1.9
Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Sep. 30, 2014
Income Taxes [Abstract]      
Effective tax rate (in hundredths) 28.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations 35.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations  
Federal statutory rate (in hundredths) 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate    
Unrecognized tax benefits that would impact effective tax rate $ 4,318us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate   $ 4,311us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Interest and penalties on tax uncertainties 88us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense    
Total penalties and interest accrued $ 2,046us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued   $ 2,135us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
United States - Federal [Member]      
Income Tax Contingency [Line Items]      
Years under examination 2011 and forward    
United States - State [Member]      
Income Tax Contingency [Line Items]      
Years under examination 2010 and forward    
Canada [Member]      
Income Tax Contingency [Line Items]      
Years under examination 2009 and forward    
Europe [Member]      
Income Tax Contingency [Line Items]      
Years under examination 2009 and forward    
United Kingdom [Member]      
Income Tax Contingency [Line Items]      
Years under examination 2013 and forward    
Australia [Member]      
Income Tax Contingency [Line Items]      
Years under examination 2010 and forward    
Asia [Member]      
Income Tax Contingency [Line Items]      
Years under examination 2008 and forward