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Goodwill and Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible assets at the balance sheet dates are comprised of the following:
  
 
December 31, 2017
(Dollars in thousands, lives in years)
 
Weighted Average Useful Life
 
Historical
Cost
 
Accumulated
Amortization
 
Net
Balance
Customer relationships
 
9.3
 
$
62,401

 
$
(34,061
)
 
$
28,340

Trade names and trademarks
 
7.4
 
6,786

 
(3,000
)
 
3,786

Non-compete agreements
 
5.0
 
574

 
(574
)
 

Other intangibles
 
6.0
 
572

 
(156
)
 
416

Total intangible assets
 
 
 
$
70,333

 
$
(37,791
)
 
$
32,542

 
 
December 31, 2016
(Dollars in thousands, lives in years)
 
Weighted Average Useful Life
 
Historical
Cost
 
Accumulated
Amortization
 
Net
Balance
Customer relationships
 
9.3
 
$
62,401

 
$
(27,364
)
 
$
35,037

Trade names and trademarks
 
7.4
 
6,786

 
(1,972
)
 
4,814

Non-compete agreements
 
5.0
 
574

 
(512
)
 
62

Other Intangibles
 
6.0
 
572

 

 
572

Total intangible assets
 
 
 
$
70,333

 
$
(29,848
)
 
$
40,485

Estimated Future Amortization Expense Related to Intangible Assets
As of December 31, 2017, estimated future amortization expense related to intangible assets is as follows (in thousands):
Years ending December 31,
Amount
2018
$
7,801

2019
7,801

2020
3,246

2021
2,917

2022
2,217

Thereafter
8,560

Total
$
32,542