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INTANGIBLE ASSETS
 3 Months Ended
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Disclosure [Text Block] INTANGIBLE ASSETS

The components of intangible assets consisted of the following as of the dates set forth below (amounts in thousands):
 
Weighted Average Useful Lives (in years) March 31, 2018
 
March 31,
2018
 
December 31,
2017
Amortizable intangible assets:
 
 
 
 
 
     Customer relationships
9.4
 
$
14,237

 
$
13,922

     Patents, trademarks and other
7.4
 
15,288

 
15,208

          Total at cost
 
 
29,525

 
29,130

     Less accumulated amortization
 
 
(15,006
)
 
(13,855
)
 
 
 
$
14,519

 
$
15,275


   
Amortization related to intangible assets for each of the three months ended March 31, 2018 and 2017, totaled $0.7 million. Intangible assets are included as a component of other assets in the Condensed Consolidated Balance Sheet.

The estimated aggregate amortization expense at March 31, 2018, for each of the years (or other periods) set forth below was as follows (amounts in thousands):
April 1 - December 31, 2018
$
1,775

2019
2,306

2020
2,285

2021
1,494

2022
1,067

Thereafter
5,592

 
$
14,519