Quarterly report pursuant to sections 13 or 15(d)

Income taxes (Details)

v2.3.0.11
Income taxes (Details) (USD $)
9 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Income taxes [Abstract]    
Effective tax rate 38.10% 38.50%
Internal Revenue Service (IRS) [Member]
   
Income Tax Examination [Line Items]    
Amount of tax settlement $ 613,000  
Interest accrued 225,000  
Internal Revenue Service (IRS) [Member] | Minimum [Member]
   
Income Tax Examination [Line Items]    
Years under examination 2005  
Internal Revenue Service (IRS) [Member] | Maximum [Member]
   
Income Tax Examination [Line Items]    
Years under examination 2007  
State and Local Jurisdiction [Member]
   
Income Tax Examination [Line Items]    
Penalties and interest due $ 435,000