|
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 | |
| X | ||||||||||
|
- Definition
A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The amount of estimated interest accrued as of the balance sheet date arising from income tax examinations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
|
| X | ||||||||||
|
- Definition
The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The tax year(s) being audited in connection with the income tax examination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Reflects the effects of adjustments of previously recorded tax expense, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, IRS tax settlement and unusual repatriation of foreign earnings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|