Long-Lived Assets (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Gross carrying amount and accumulated amortization of intangible assets
Total Gross Carrying Amount	$ 322,749	$ 321,234
Accumulated Amortization	179,031	161,371
Amortization expense related to intangible assets	18,200	21,300	$ 20,200
CCP Contracts
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	112,300	112,300
Accumulated Amortization	$ 69,875	64,192
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	$ 109,078	107,953
Accumulated Amortization	$ 57,844	50,355
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	$ 66,960	67,220
Accumulated Amortization	$ 36,554	33,394
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	14,526
Accumulated Amortization	$ 12,574	11,686
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	$ 4,585	3,935
Accumulated Amortization	$ 2,184	1,744
Other Intangible Assets | Minimum
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	5 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	$ 15,300