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Related Party Transactions (Tables)
3 Months Ended
Mar. 31, 2019
Related Party Transactions [Abstract]  
Schedule of Common or Related Party Transactions
The amount of sales to related parties as well as the purchases from and rent expense paid to related parties were as follows (in thousands):
 
 
 
Three months ended March 31,
 
 
 
2019
 
 
2018
 
Sales
 
$
2,661
 
 
$
2,893
 
Purchases
 
 
388
 
 
 
363
 
Rent
 
 
260
 
 
 
281