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Income Taxes (Details) (USD $)
3 Months Ended 9 Months Ended
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2013
Jun. 30, 2012
Sep. 30, 2012
Income Tax Disclosure [Abstract]                
Effective income tax rate           18.50% 20.60%  
Discrete income tax (benefit) $ (100,000) $ (400,000) $ (100,000) $ 1,100,000 $ 100,000      
Percentage points that reduced effective tax rate           (13.7) (18.6)  
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]                
Unrecognized tax benefits, beginning balance     2,720,000     2,720,000    
Increases related to prior year income tax positions           202,000    
Decreases related to expiration of statute of limitations           (191,000)    
Unrecognized tax benefits, ending balance 2,731,000         2,731,000    
Unrecognized tax benefits that would impact effective tax rate 2,700,000         2,700,000    
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound 400,000         400,000    
Income tax penalties and interest accrued 600,000         600,000   600,000
Accumulated undistributed foreign earnings 24,500,000         24,500,000    
Minimum [Member]
               
Income Tax Contingency [Line Items]                
Estimated unrecognized deferred tax liability 2,500,000         2,500,000    
Maximum [Member]
               
Income Tax Contingency [Line Items]                
Estimated unrecognized deferred tax liability $ 3,500,000         $ 3,500,000