Long-Lived Assets (Details 2) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Gross carrying amount and accumulated amortization of intangible assets
Total Gross Carrying Amount	$ 321,234,000	$ 321,613,000
Accumulated Amortization	161,371,000	181,816,000
Amortization expense related to intangible assets	21,300,000	20,200,000	20,700,000
CCP Contracts
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	112,300,000	106,400,000
Accumulated Amortization	64,192,000	58,699,000
CCP Contracts | Minimum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	15 years
CCP Contracts | Maximum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	20 years
Customer Relationships
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	107,953,000	83,564,000
Accumulated Amortization	50,355,000	44,129,000
Customer Relationships | Minimum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	5 years
Customer Relationships | Maximum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	17 years
Trade Names
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	67,220,000	67,790,000
Accumulated Amortization	33,394,000	30,502,000
Trade Names | Minimum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	5 years
Trade Names | Maximum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	20 years
Patents and Patented Technologies
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	14,526,000	55,099,000
Accumulated Amortization	11,686,000	46,954,000
Patents and Patented Technologies | Minimum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	5 years
Patents and Patented Technologies | Maximum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	19 years
Other Intangible Assets
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	3,935,000	3,960,000
Accumulated Amortization	1,744,000	1,532,000
Other Intangible Assets | Minimum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	3 years
Other Intangible Assets | Maximum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	17 years
Trade Names
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	$ 15,300,000	$ 4,800,000