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Unearned Revenue
9 Months Ended
Sep. 30, 2023
Revenue Recognition and Deferred Revenue [Abstract]  
Unearned Revenue .  Unearned Revenue
The following table presents our unearned revenue as of the respective periods:
(in thousands)September 30, 2023December 31, 2022
California$1,423,845 $945,971 
Central1,581,426 1,444,983 
Mountain959,478 486,524 
Total$3,964,749 $2,877,478 
All unearned revenue is in the Construction segment. Approximately $2.5 billion of the September 30, 2023 unearned revenue is expected to be recognized within the next twelve months and the remaining amount will be recognized thereafter.