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
Mar. 31, 2021
Mar. 31, 2020
Change in Accounts Receivable    
Beginning balance $ 41,637  
Ending balance 44,916  
Change in Contract with Customer, Asset    
Beginning balance 10,343  
Ending balance 13,046  
Construction Contract Revenue    
Change in Accounts Receivable    
Beginning balance 13,997 $ 12,378
Ending balance 7,283 10,852
Change in Contract with Customer, Asset    
Beginning balance 10,343 17,223
Ending balance 13,046 7,463
Change in Contract with Customer, Liability    
Beginning balance 4,610 1,184
Ending balance 6,193 1,417
Portion of beginning balance recognized in revenue during period $ 547 $ 646