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Inventories
9 Months Ended
Sep. 30, 2019
Inventories  
Inventories

(4) Inventories

Components of inventories are as follows (in thousands):

    

September 30, 2019

    

December 31, 2018

Serialized parts

$

43,629

$

45,568

Non-serialized parts

 

48,891

 

43,439

Total inventories

$

92,520

$

89,007