Intangible Assets

6 Months Ended

Mar. 31, 2013

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, 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

The increase in gross amount of intangible assets from September 30, 2012 to March 31, 2013 is primarily attributable to assets acquired in the Kleer Lumber acquisition described in Note 11. Total amortization expense related to intangible assets was approximately $5.3 million for each of  the quarters ended March 31, 2012 and 2013, and approximately $10.8 million and $10.2 million for the six months ended March 31, 2012 and 2013, respectively. Total estimated annual amortization expense for fiscal years 2013 through 2018 is shown in the following table.

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