|
Employee benefit plans and deferred compensation (Details) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Sep. 30, 2010
|
|
| Employee benefit plans and deferred compensation | |||
| Employer contribution to 401(k) plans | $ 3,000,000 | $ 3,000,000 | $ 3,200,000 |
| Deferred compensation plan assets, cash and cash equivalents | 1,500,000 | ||
| Asset related to life insurance assets, which are held at cash surrender value | 9,220,000 | 8,004,000 | |
| Deferred compensation plan liabilities | $ 12,400,000 | ||
| X | ||||||||||
|
- Definition
Carrying amount as of the balance sheet date of cash and cash equivalents held under deferred compensation agreements. No definition available.
|
| X | ||||||||||
|
- Definition
Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. No definition available.
|
| X | ||||||||||
|
- Definition
The amount of the cost recognized during the period for defined contribution plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|