Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets

v3.19.2
Intangible Assets
 6 Months Ended
Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets

Intangible Assets Subject to Amortization
 
June 30, 2019
 
December 31, 2018
 
Gross
    
 
    
Net
    
Gross
    
 
    
Net
 
carrying
 
Accumulated
 
carrying
 
carrying
 
Accumulated
 
carrying
 
amount
 
amortization
 
amount
 
amount
 
amortization
 
amount
 
amounts in thousands
Customer relationships
$
408,267

 
(75,292
)
 
332,975

 
408,267

 
(55,417
)
 
352,850

Other amortizable intangibles
128,452

 
(50,600
)
 
77,852

 
122,759

 
(39,603
)
 
83,156

Total
$
536,719

 
(125,892
)
 
410,827

 
531,026

 
(95,020
)
 
436,006



Amortization expense for intangible assets with finite useful lives was $15.0 million and $16.4 million for the three months ended June 30, 2019 and 2018, respectively. Amortization expense for intangible assets with finite useful lives was $31.3 million and $21.6 million for the six months ended June 30, 2019 and 2018, respectively. Amortization expense for amortizable intangible assets for each of the five succeeding fiscal years is estimated to be (amounts in thousands):
Remainder of 2019
$
30,665

2020
$
52,305

2021
$
41,924

2022
$
36,261

2023
$
33,434