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ACCOUNTS RECEIVABLE RESERVES (Tables)
 12 Months Ended
Dec. 31, 2014
Receivables [Abstract]  
Changes in accounts receivable reserves
Changes in accounts receivable reserves consisted of the following (in thousands):
 
 
For the Year Ended December 31,
 
2014
 
2013
 
2012
Balance, beginning of year
$
14,116

 
$
10,322

 
$
6,103

Provision charged to expense
22,990

 
16,451

 
16,094

Charge-offs and adjustments
(21,546
)
 
(13,072
)
 
(11,977
)
Currency translation adjustments
(1,348
)
 
415

 
102

Balance, end of year
$
14,212

 
$
14,116

 
$
10,322