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Employee benefit plans and deferred compensation (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2012
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| Employee benefit plans and deferred compensation | |||
| Employer contribution to 401(k) plans | $ 4.3 | $ 3.8 | $ 3.0 |
| Investments in mutual funds within the rabbi trust | $ 6.2 | ||
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The amount of the cost recognized during the period for defined contribution plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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