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Inventories
6 Months Ended
Jun. 30, 2022
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories in the accompanying Consolidated Balance Sheets consisted of the following amounts as of June 30, 2022 and December 31, 2021 (in thousands):
June 30,
2022
December 31,
2021
Raw materials and construction materials$81,961 $46,186 
Work in process11,503 7,912 
Inventories$93,464 $54,098 
The increase in inventories as of June 30, 2022, compared to December 31, 2021, was primarily a result of advanced purchases of materials and equipment for use on specific construction projects, in an effort to mitigate the impact of increased lead times, which have resulted from supply chain disruptions.