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Intangible Assets
 12 Months Ended
Dec. 31, 2013
Intangible Assets [Abstract]  
Intangible Assets
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


During the year ended December 31, 2013, the Company acquired $0.4 million of identifiable intangible assets as part of the acquisition of MARSS and $2.5 million of identifiable intangible assets as part of the acquisition of certain tangible assets and intellectual property from DOC Charlotte. During the year ended December 31, 2012, the Company acquired $15.1 million of identifiable intangible assets as part of the acquisition of Lorex and $20.1 million as part of the acquisition of Traficon. Intangible assets at December 31, 2012 have been retrospectively adjusted for the purchase price accounting completed during 2013 associated with the Lorex and Traficon acquisitions. See Note 18, "Business Acquisitions."
The aggregate amortization expense recorded in 2013, 2012 and 2011 was $24.7 million, $24.4 million and $33.2 million, respectively. 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