Intangible Assets Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Intangible Assets [Abstract]

Intangible assets

Intangible assets are summarized as follows (in thousands):

	Weighted Average Estimated Useful Life	December 31,
		2013			2012 (as adjusted)
Product technology	11 years	$	69,919		$	94,975
Customer relationships	11 years	83,899			84,681
Trademarks and tradename portfolios	15 years	7,160			7,160
Tradename portfolio not subject to amortization	Indefinite	39,166			38,875
Other	5 years	21,996			24,319
Acquired identifiable intangibles		222,140			250,010
Less accumulated amortization		(70,517		)	(78,328		)
Net acquired identifiable intangibles		151,623			171,682
Patents	17 years	4,471			4,464
Less accumulated amortization		(3,989		)	(3,960		)
Net patents		482			504
Acquired in-place leases and other	6 years	9,333			9,150
Less accumulated amortization		(7,243		)	(5,513		)
Net acquired in-place leases and other		2,090			3,637
		$	154,195		$	175,823

Estimated future aggregate amortization expense

For intangible assets recorded at December 31, 2013, the estimated future aggregate amortization expense for the years ending December 31, 2014 through 2018 is approximately (in thousands):

2014	$	21,450
2015	16,510
2016	12,025
2017	11,544
2018	9,391