Intangible Assets

12 Months Ended

Dec. 31, 2012

Intangible Assets [Abstract]

Intangible Assets

Intangible Assets

Intangible assets are summarized as follows (in thousands):

	Weighted Average Estimated Useful Life	December 31,
		2012			2011
Product technology	11 years	$	89,818		$	89,722
Customer relationships	11 years	64,083			67,862
Trademarks and tradename portfolios	15 years	7,160			7,910
Tradename portfolio not subject to amortization	Indefinite	32,076			32,076
Other	5 years	20,380			21,920
Acquired identifiable intangibles		213,517			219,490
Less accumulated amortization		(78,328		)	(62,490		)
Net acquired identifiable intangibles		135,189			157,000
Patents	17 years	4,464			4,202
Less accumulated amortization		(3,960		)	(3,478		)
Net patents		504			724
Acquired in-place leases and other	7 years	12,971			12,882
Less accumulated amortization		(8,043		)	(6,166		)
Net acquired in-place leases and other		4,928			6,716
		$	140,621		$	164,440

During the year ended December 31, 2011, the Company acquired $8.8 million of identifiable intangible assets as part of the acquisition of Aerius and $1.1 million of identifiable intangible assets as part of the acquisition of two other small companies. Intangible assets related to two acquisitions in 2012 are subject to the allocation of their respective purchase prices. Accordingly, there are no intangible assets recorded related to these two acquisitions as of December 31, 2012. See Note 18 - Business Acquisitions.

The aggregate amortization expense recorded in 2012, 2011 and 2010 was $24.4 million, $33.2 million and $25.8 million, respectively. For intangible assets recorded at December 31, 2012, the estimated future aggregate amortization expense for the years ending December 31, 2013 through 2017 is approximately (in thousands):

2013	$	22,892
2014	18,055
2015	13,856
2016	9,094
2017	8,355

Note 8.        Intangible Assets - (Continued)

The Company continually monitors for events and changes in circumstances that could indicate that the carrying amounts of the Company’s intangible assets may not be recoverable. When such events or changes in circumstances occur, the Company will assess the recoverability of intangible assets by determining whether the carrying value of such assets will be recovered through their expected future cash flows. If the future undiscounted cash flows are determined to be less than the carrying amount of the intangible assets, the Company will recognize an impairment loss based on the excess of the carrying amount over the fair value of the assets. The Company did not recognize any intangible asset impairment charges in the years ended December 31, 2012, 2011 and 2010.