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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Changes in Carrying Amount of Goodwill by Segment
The changes in the carrying amount of goodwill by segment is shown below:
 
Services
 
International
 
Products and Systems
 
Total
Balance at December 31, 2016
$
123,392

 
$
33,351

 
$
13,197

 
$
169,940

Goodwill acquired during the year
41,695

 
—

 
—

 
41,695

Impairment charge
—

 
—

 
(13,197
)
 
(13,197
)
Adjustments to preliminary purchase price allocations
(211
)
 
—

 
—

 
(211
)
Foreign currency translation
925

 
4,286

 
—

 
5,211

Balance at December 31, 2017
$
165,801

 
$
37,637

 
$
—

 
$
203,438

Goodwill acquired during the year
83,163

 
—

 
—

 
83,163

Adjustments to preliminary purchase price allocations
(1,977
)
 
—

 
—

 
(1,977
)
Foreign currency translation
(3,511
)
 
(1,854
)
 
—

 
(5,365
)
Balance at December 31, 2018
$
243,476

 
$
35,783

 
$
—

 
$
279,259