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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2012
Commitments and Contingencies [Abstract]  
Future non-cancelable purchase and service obligations
We enter into non-cancelable fixed purchase and service obligations in the ordinary course of business.  These arrangements primarily consist of advertising commitments and service contracts.  At December 31, 2012, future non-cancelable purchase and service obligations greater than $100,000 and one year were as follows (in thousands):
 
2013                                                              
 
$
6,308
 
2014                                                              
 
 
7,006
 
2015                                                              
 
 
5,700
 
2016                                                              
 
 
4,902
 
2017                                                              
 
 
1,430
 
Thereafter                                                              
 
 
5,490
 
Total obligations                                                         
 
$
30,836