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Goodwill and Intangible Assets
6 Months Ended
Jun. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
Goodwill and Intangible Assets
The changes in the carrying amount of goodwill by reportable operating segment for the six months ended June 30, 2016 are summarized as follows:
 
North America
 
Europe
 
Asia Pacific
 
South America
 
Total
Balance at January 1, 2016
$
114,109

 
$
11,056

 
$
24,054

 
$

 
$
149,219

Acquisition

 

 
3,334

 

 
3,334

Foreign exchange translation
820

 
201

 
(597
)
 

 
424

Balance at June 30, 2016
$
114,929

 
$
11,257

 
$
26,791

 
$

 
$
152,977


Goodwill is tested for impairment by reporting unit either annually or when events or circumstances indicate that an impairment may exist. There were no indicators of potential impairment during the six months ended June 30, 2016.
The following table presents intangible assets and accumulated amortization balances of the Company as of June 30, 2016 and December 31, 2015, respectively:
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Customer relationships
$
115,137

 
$
(66,938
)
 
$
48,199

Developed technology
8,915

 
(8,249
)
 
666

Other
15,905

 
(1,441
)
 
14,464

Balance at June 30, 2016
$
139,957

 
$
(76,628
)
 
$
63,329

 
 
 
 
 
 
Customer relationships
$
115,285

 
$
(61,375
)
 
$
53,910

Developed technology
8,854

 
(7,673
)
 
1,181

Other
16,290

 
(679
)
 
15,611

Balance at December 31, 2015
$
140,429

 
$
(69,727
)
 
$
70,702


Amortization expense totaled $3,239 and $3,672 for the three months ended June 30, 2016 and 2015, respectively, and $6,517 and $7,220 for the six months ended June 30, 2016 and 2015, respectively. Amortization expense is estimated to be approximately $12,800 for the year ending December 31, 2016.