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GOODWILL (Tables)
 9 Months Ended
Sep. 30, 2015
Goodwill [Abstract]  
Schedule of goodwill
The changes in the carrying amount of goodwill by operating segment consist of the following (in thousands):
 
North America
 
International
 
Total
Goodwill, December 31, 2013
$
692,639

 
$
25,948

 
$
718,587

Acquisition
421,724

 
—

 
421,724

Effect of foreign currency translation
—

 
(1,506
)
 
(1,506
)
Goodwill, December 31, 2014
1,114,363

 
24,442

 
1,138,805

Acquisitions
109,305

 
2,400

 
111,705

Effect of foreign currency translation
—

 
(565
)
 
(565
)
Goodwill, September 30, 2015
$
1,223,668

 
$
26,277

 
$
1,249,945