Intangible Assets (Tables)

6 Months Ended

Mar. 31, 2013

Intangible Assets

Schedule of gross carrying amounts and accumulated amortization of intangible assets

		September 30, 2012				March 31, 2013
(in thousands)	Estimated useful lives	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
CCP contracts	20 years	$	106,400	$	53,379	$	106,400	$	56,039
Customer relationships	5 - 15 years	72,464		38,382		84,613		41,180
Trade names	5 - 20 years	67,890		27,105		75,963		28,988
Patents and patented technologies	4 - 19 years	55,102		41,661		55,002		44,307
Other	3 - 17 years	3,760		1,178		4,660		1,416
		$	305,616	$	161,705	$	326,638	$	171,930

Schedule of total estimated annual amortization expense

Year ending September 30:	(in thousands)
2013	$	21,068
2014	20,693
2015	16,539
2016	16,282
2017	15,404
2018	15,129