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Prepaid Expenses and Other Current Assets
12 Months Ended
Dec. 31, 2012
Prepaid Expense and Other Assets [Abstract]  
Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets are summarized as follows as of December 31, 2012 and 2011:
 
(in thousands)
2012
 
2011
Prepaid expenses
$
30,354

 
$
27,832

Amounts held in escrow in connection with acquisitions
7,521

 
7,026

Value added tax
10,221

 
9,488

Other receivables
7,267

 
14,709

 
$
55,363

 
$
59,055