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Related Party Transactions (Tables)
 6 Months Ended
Jun. 30, 2014
Related Party Transactions [Abstract]  
Schedule of related party transactions
During the three and six months ended June 30, 2014 and 2013, we engaged in the following transactions with companies related to members of our Board of Directors, as described below (in thousands):
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
 
2014
 
2013
 
2014
 
2013
Sales to related parties
 
$
101

 
$
584

 
$
228

 
$
615

Rent expense to related parties
 
472

 
468

 
907

 
943