Quarterly report pursuant to Section 13 or 15(d)

Construction Contract and Other Service Revenues - Rollforwards (Details)

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Construction Contract and Other Service Revenues - Rollforwards (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Change in Accounts Receivable        
Beginning balance     $ 41,637  
Ending balance $ 33,110   33,110  
Change in Contract with Customer, Asset        
Beginning balance     10,343  
Ending balance 12,987   12,987  
Construction Contract Revenue        
Change in Accounts Receivable        
Beginning balance     13,997 $ 12,378
Ending balance 5,726 $ 11,183 5,726 11,183
Change in Contract with Customer, Asset        
Beginning balance     10,343 17,223
Ending balance 12,987 13,980 12,987 13,980
Change in Contract with Customer, Liability        
Beginning balance     4,610 1,184
Ending balance 3,818 5,236 3,818 5,236
Portion of beginning balance recognized in revenue during the period $ 9 $ 19 $ 2,626 $ 757