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Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of gross amount and accumulated amortization of intangible assets
The gross carrying amount and accumulated amortization of intangible assets were as follows:

 
 
 
December 31,
 
December 31,
 
 
 
2017
 
2016
 
Useful Life
(Years)
 
Gross
Amount
 
Accumulated
Amortization
 
Impairment
 
Net
Carrying
Amount
 
Gross
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Customer relationships
5-14
 
$
113,299

 
$
(58,107
)
 
$
(170
)
 
$
55,022

 
$
81,559

 
$
(50,417
)
 
$
31,142

Software/Technology
3-15
 
19,523

 
(14,133
)
 
(2,411
)
 
2,979

 
18,128

 
(12,577
)
 
5,551

Covenants not to compete
2-5
 
12,510

 
(10,438
)
 

 
2,072

 
11,143

 
(9,647
)
 
1,496

Other
2-5
 
10,109

 
(6,411
)
 
(32
)
 
3,666

 
7,266

 
(5,448
)
 
1,818

Total
 
 
$
155,441

 
$
(89,089
)
 
$
(2,613
)
 
$
63,739

 
$
118,096

 
$
(78,089
)
 
$
40,007

Schedule of expected amortization expense of intangible assets
Amortization expense in each of the five years and thereafter subsequent to December 31, 2017 related to the Company’s intangible assets is expected to be as follows:
 
Expected
Amortization
Expense
 
 

2018
$
10,117

2019
8,952

2020
7,483

2021
6,411

2022
6,076

Thereafter
24,700

Total
$
63,739