Goodwill (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
Sep. 30, 2011	Sep. 30, 2011
Impairment		$ 0
Assumed annual compound growth rate after five or ten years	4.30%
Minimum [Member]
Weighted average cost of capital assumption	10.00%
Maximum [Member]
Weighted average cost of capital assumption	10.20%

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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+ Details