|
401(k) Benefit Plan (Details) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Sep. 30, 2011
|
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| 401(k) Benefit Plan | |||
| Amount contributed and recorded expense under the 401(k) Benefit Plan | $ 2,382,000 | $ 1,113,000 | $ 703,000 |