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Goodwill and Related Intangible Assets
6 Months Ended
Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Related Intangible Assets
GOODWILL AND RELATED INTANGIBLE ASSETS
Goodwill
The changes in the carrying amount of goodwill for the six months ended June 30, 2014 are as follows (in thousands):
 
Residential
Products
 
Industrial and
Infrastructure
Products
 
Total
Balance at December 31, 2013
$
195,520

 
$
145,654

 
$
341,174

Foreign currency translation

 
22

 
22

Balance at June 30, 2014
$
195,520

 
$
145,676

 
$
341,196


The goodwill balances as of June 30, 2014 and December 31, 2013 are net of accumulated impairment losses of $150,965,000.

Acquired Intangible Assets
Acquired intangible assets consist of the following (in thousands):
 
June 30, 2014
 
December 31, 2013
 
 
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Estimated Life
Indefinite-lived intangible assets:
 
 
 
 
 
 
 
 
 
Trademarks
$
45,791

 
$

 
$
45,724

 
$

 
Indefinite
Finite-lived intangible assets:
 
 
 
 
 
 
 
 
 
Trademarks
3,996

 
1,636

 
3,989

 
1,420

 
2 to 15 Years
Unpatented technology
24,690

 
7,874

 
24,690

 
6,980

 
5 to 20 Years
Customer relationships
54,279

 
30,716

 
54,171

 
28,926

 
5 to 16 Years
Non-compete agreements
1,937

 
1,493

 
1,937

 
1,408

 
4 to 10 Years
Backlog
1,330

 
1,330

 
1,330

 
1,330

 
1 to 2 Years
 
86,232

 
43,049

 
86,117

 
40,064

 
 
Total acquired intangible assets
$
132,023

 
$
43,049

 
$
131,841

 
$
40,064

 
 


The following table summarizes the acquired intangible asset amortization expense for the three and six months ended June 30 (in thousands):
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
2014
 
2013
 
2014
 
2013
Amortization expense
$
1,435

 
$
1,677

 
$
2,874

 
$
3,396




Amortization expense related to acquired intangible assets for the remainder of fiscal 2014 and the next five years thereafter is estimated as follows (in thousands):
2014
$2,844
2015
$5,580
2016
$5,245
2017
$4,883
2018
$4,321
2019
$2,172