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Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Inventories  
Schedule of Inventories Inventory consisted of the following (in thousands):

March 31,

December 31,

2021

2020

Raw materials

$

1,090,025

$

790,324

Supplies

494,045

500,497

Work in progress

209,786

162,843

Finished goods

423,678

389,884

Total inventories

$

2,217,534

$

1,843,548