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Related Party Transactions (Tables)
9 Months Ended
Sep. 30, 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 September 30,
   
Nine months ended September 30,
 
 
2019
   
2018
   
2019
   
2018
 
Sales
  $
 
3,736
    $
 
3,259
    $
9,658
    $
9,361
 
Purchases
   
469
     
372
     
1,327
     
1,207
 
Rent
   
256
     
257
     
773
     
829