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Inventories
12 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
Inventories INVENTORIES
Inventories in the accompanying Consolidated Balance Sheets consisted of the following amounts as of December 31, 2022 and 2021 (in thousands):
December 31, 2022December 31, 2021
Raw materials and construction materials$74,014 $46,186 
Work in process11,627 7,912 
Inventories$85,641 $54,098 
The increase in inventories as of December 31, 2022, compared to December 31, 2021, was a result of: (a) advanced purchases of materials and equipment for use on specific construction projects, in an effort to mitigate the impact of extended lead times, which have resulted from supply chain disruptions, and (b) an increase in raw materials on hand to support our fabrication facilities given the growth in demand for our fire protection services.