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Goodwill and Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill The changes in the carrying amount of goodwill from December 31, 2018 to March 31, 2019, were as follows (in thousands):
 
Drilling & Downhole
 
Completions
 
Production
 
Total
Goodwill Balance at December 31, 2018
$
191,151

 
$
259,280

 
$
19,216

 
$
469,647

Purchase accounting adjustments
427

 
—

 
—

 
427

Impact of non-U.S. local currency translation
68

 
485

 
47

 
600

Goodwill Balance at March 31, 2019
$
191,646

 
$
259,765

 
$
19,263

 
$
470,674
Summary of Intangible Assets Intangible assets consisted of the following as of March 31, 2019 and December 31, 2018, respectively (in thousands):
 
March 31, 2019
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Amortizable Intangibles
 
Amortization Period (In Years)
Customer relationships
$
337,758

 
$
(115,819
)
 
$
221,939

 
4-15
Patents and technology
104,384

 
(18,855
)
 
85,529

 
5-17
Non-compete agreements
6,259

 
(5,694
)
 
565

 
3-6
Trade names
47,560

 
(19,336
)
 
28,224

 
10-15
Distributor relationships
22,160

 
(17,918
)
 
4,242

 
8-15
Trademarks
10,319

 
(509
)
 
9,810

 
15 - Indefinite
Intangible Assets Total
$
528,440

 
$
(178,131
)
 
$
350,309

 
 

 
December 31, 2018
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Amortizable Intangibles
 
Amortization Period (In Years)
Customer relationships
$
337,546

 
$
(110,228
)
 
$
227,318

 
4-15
Patents and technology
104,394

 
(17,148
)
 
87,246

 
5-17
Non-compete agreements
6,245

 
(5,600
)
 
645

 
3-6
Trade names
47,493

 
(18,107
)
 
29,386

 
10-15
Distributor relationships
22,160

 
(17,602
)
 
4,558

 
8-15
Trademarks
10,319

 
(424
)
 
9,895

 
15 - Indefinite
Intangible Assets Total
$
528,157

 
$
(169,109
)
 
$
359,048