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ACCOUNTS RECEIVABLE RESERVES (Tables)
 12 Months Ended
Dec. 31, 2012
Accounts Receivable Reserves Disclosure [Abstract]  
Changes in accounts receivable reserves
Changes in accounts receivable reserves consisted of the following (in thousands):
 
 
For the Year Ended December 31,
 
2012
 
2011
 
2010
Balance, beginning of year
$
6,103

 
$
6,353

 
$
5,023

Provision charged to expense
16,094

 
9,331

 
7,102

Charge-offs and adjustments
(11,977
)
 
(9,449
)
 
(5,554
)
Currency translation adjustments
102

 
(132
)
 
(218
)
Balance, end of year
$
10,322

 
$
6,103

 
$
6,353