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Intangibles
 6 Months Ended
Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangibles
8.
Intangibles

The following table presents our acquired finite-lived intangible assets at June 30, 2018 and December 31, 2017 (in thousands):
 
 
 
June 30, 2018
 
December 31, 2017
 
Weighted
Average
Life
 
Gross
Carrying
Amount
 

Accumulated
Amortization
 
Gross
Carrying
Amount
 

Accumulated
Amortization
Customer relationships
23 years
 
$
40,823

 
$
(2,256
)
 
$
40,823

 
$
(1,353
)
Trade name
13 years
 
5,307

 
(656
)
 
5,307

 
(394
)
Noncompetition agreements
7 years
 
487

 
(87
)
 
487

 
(52
)
  Total (1)
22 years
 
$
46,617

 
$
(2,999
)
 
$
46,617

 
$
(1,799
)

    
Our intangible expense was $0.6 million and $1.2 million for the three and six months ended June 30, 2018 and $1.8 million for the year ended December 31, 2017.