Intangible Assets

6 Months Ended

Mar. 31, 2012

Intangible Assets

Intangible Assets

5.Intangible Assets

All of Headwaters’ identified intangible assets are being amortized. The following table summarizes the gross carrying amounts and related accumulated amortization of intangible assets as of:

		September 30, 2011				March 31, 2012
(in thousands)	Estimated useful lives	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
CCP contracts	8 - 20 years	$	117,690	$	58,643	$	106,400	$	50,719
Customer relationships	5 - 15 years	77,914		38,454		72,464		35,786
Trade names	5 - 20 years	67,890		23,608		67,890		25,357
Patents and patented technologies	2 - 19 years	54,736		36,296		55,077		38,966
Other	2 - 17 years	4,985		1,993		3,760		1,005
		$	323,215	$	158,994	$	305,591	$	151,833

The decreases during 2012 in gross carrying amount and accumulated amortization are attributable to fully amortized assets that have been removed from the respective accounts.

Total amortization expense related to intangible assets was approximately $5.6 million and $5.3 million for the quarters ended March 31, 2011 and 2012, respectively. Total amortization expense was approximately $11.2 million and $10.8 million for the six months ended March 31, 2011 and 2012, respectively. Total estimated annual amortization expense for fiscal years 2012 through 2017 is shown in the following table.

Year ending September 30:	(in thousands)
2012	$	20,676
2013	19,745
2014	19,202
2015	15,056
2016	14,799
2017	13,921