Goodwill and Other Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Changes in the carrying value of goodwill, by segment
Beginning Balance	$ 173,206	$ 117,305
Acquisitions	199,233	56,790
Effect of foreign currency translation changes	2,224	(889)
Ending Balance	374,663	173,206
US & Canada Operations [Member]
Changes in the carrying value of goodwill, by segment
Beginning Balance	163,897	110,255
Acquisitions	60,409	53,642
Effect of foreign currency translation changes	0	0
Ending Balance	224,306	163,897
Latin America [Member]
Changes in the carrying value of goodwill, by segment
Beginning Balance	9,309	7,050
Acquisitions	99,486	3,148
Effect of foreign currency translation changes	1,606	(889)
Ending Balance	110,401	9,309
Other International [Member]
Changes in the carrying value of goodwill, by segment
Beginning Balance	0	0
Acquisitions	39,338	0
Effect of foreign currency translation changes	618	0
Ending Balance	$ 39,956	$ 0

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

- Definition

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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+ Details