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Intangible Assets Other Than Goodwill (Tables)
 3 Months Ended
Mar. 31, 2017
Intangible Assets
Intangible assets as of March 31, 2017 and December 31, 2016 include the following (in thousands, except for weighted useful lives):

 
        
March 31, 2017
    
December 31, 2016
  
   
Weighted
Useful
Lives
    
Gross
Carrying Amount
    
Accumulated Amortization
    
Net
Amount
    
Gross
Carrying Amount
    
Accumulated Amortization
    
Net
Amount
  
   
(Years)
                                      
Amortized Intangible Assets:
                                          
Licenses
    
5.81
    
$
20,130
    
$
(17,535
)
  
$
2,595
    
$
20,130
    
$
(17,248
)
  
$
2,882
  
Product lines
    
7.50
      
50,093
      
(22,236
)
    
27,857
      
50,093
      
(20,634
)
    
29,459
  
Customer relationships
    
4.90
      
3,152
      
(2,841
)
    
311
      
3,152
      
(2,755
)
    
397
  
Trade names
    
5.00
      
3,000
      
(2,800
)
    
200
      
3,000
      
(2,650
)
    
350
  
Non-compete agreements
    
5.00
      
200
      
(187
)
    
13
      
200
      
(177
)
    
23
  
Total amortized intangible assets
          
$
76,575
    
$
(45,599
)
  
$
30,976
    
$
76,575
    
$
(43,464
)
  
$
33,111
  
Unamortized Intangible Assets:
                                                        
Trademarks
          
$
2,608
    
$
—
    
$
2,608
    
$
2,608
    
$
—
    
$
2,608