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Goodwill and Identified Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Goodwill
The following table presents a reconciliation of the beginning and ending balances of the Company’s goodwill at January 1, 2017 and March 31, 2017 (in thousands):
 
Infrastructure
Solutions
 
Corrosion
Protection
 
Energy
Services
 
Total
Balance, January 1, 2017
 
 
 
 
 
 
 
Goodwill, gross
$
239,494

 
$
73,875

 
$
80,246

 
$
393,615

Accumulated impairment losses
(16,069
)
 
(45,400
)
 
(33,527
)
 
(94,996
)
Goodwill, net
223,425

 
28,475

 
46,719

 
298,619

Acquisitions (1)
3,377

 
—

 
—

 
3,377

Foreign currency translation
688

 
65

 
—

 
753

Balance, March 31, 2017
 
 
 
 
 
 
 
Goodwill, gross
243,559

 
73,940

 
80,246

 
397,745

Accumulated impairment losses
(16,069
)
 
(45,400
)
 
(33,527
)
 
(94,996
)
Goodwill, net
$
227,490

 
$
28,540

 
$
46,719

 
$
302,749

__________________________
(1) 
During the first quarter of 2017, the Company recorded goodwill of $3.4 million related to the acquisition of Environmental Techniques (see Note 1).
Schedule of Identified Intangible Assets
Identified Intangible Assets
Identified intangible assets consisted of the following (in thousands):
 
 
 
March 31, 2017
 
December 31, 2016
 
Weighted
Average
Useful
Lives
(Years)
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
License agreements
9.3
 
$
4,426

 
$
(3,488
)
 
$
938

 
$
4,418

 
$
(3,438
)
 
$
980

Leases
10.6
 
2,065

 
(948
)
 
1,117

 
2,065

 
(912
)
 
1,153

Trademarks (1)
13.7
 
24,664

 
(8,285
)
 
16,379

 
24,185

 
(7,868
)
 
16,317

Non-competes
1.6
 
1,309

 
(1,082
)
 
227

 
1,308

 
(1,054
)
 
254

Customer relationships (1)
11.2
 
189,416

 
(56,898
)
 
132,518

 
187,554

 
(53,830
)
 
133,724

Patents and acquired technology
10.0
 
66,526

 
(24,603
)
 
41,923

 
66,222

 
(23,739
)
 
42,483

 
 
 
$
288,406

 
$
(95,304
)
 
$
193,102

 
$
285,752

 
$
(90,841
)
 
$
194,911


__________________________
(1) 
During the first quarter of 2017, the Company recorded trademarks of $0.4 million and customer relationships of $1.6 million related to the acquisition of Environmental Techniques (see Note 1).
Schedule of Estimated Amortization Expense
Estimated amortization expense by year is as follows (in thousands):
2017
 
$
17,320

2018
 
17,305

2019
 
17,049

2020
 
16,925

2021
 
16,878