Acquisitions (Tables)

12 Months Ended

Sep. 30, 2011

Acquisitions [Abstract]

Allocation of Purchase Price to assets acquired and liabilities assumed

	2011		2010		2009
Net current assets	$	2,462	$	3,578	$	1,916
Property, plant and equipment		15,998		15,812		17,646
Goodwill		13,053		12,930		24,048
Customer relationships and noncompete agreements (estimated useful life of 10 and 5 years, respectively)		12,006		10,981		10,268
Total	$	43,519	$	43,301	$	53,878