Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Gross carrying amount and accumulated amortization of intangible assets
Total Gross Carrying Amount	$ 324,198		$ 322,749
Accumulated Amortization	183,023		179,031
Amortization expense related to intangible assets	4,600	$ 4,500
Trade Names
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	16,090		15,300
CCP Contracts
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	112,300		112,300
Accumulated Amortization	71,296		69,875
Customer Relationships
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	110,242		109,078
Accumulated Amortization	59,735		57,844
Trade Names
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	66,960		66,960
Accumulated Amortization	37,393		36,554
Patents and Patented Technologies
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	14,021		14,526
Accumulated Amortization	12,304		12,574
Other Intangible Assets
Gross carrying amount and accumulated amortization of intangible assets
Gross Carrying Amount	4,585		4,585
Accumulated Amortization	$ 2,295		$ 2,184
Minimum | CCP Contracts
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	15 years
Minimum | Customer Relationships
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	5 years
Minimum | Trade Names
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	5 years
Minimum | Patents and Patented Technologies
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	5 years
Minimum | Other Intangible Assets
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	5 years
Maximum | CCP Contracts
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	20 years
Maximum | Customer Relationships
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	17 years
Maximum | Trade Names
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	20 years
Maximum | Patents and Patented Technologies
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	19 years
Maximum | Other Intangible Assets
Gross carrying amount and accumulated amortization of intangible assets
Estimated useful lives	17 years