Quarterly report pursuant to Section 13 or 15(d)

Construction Contract and Other Service Revenues - Narrative (Details)

v3.21.2
Construction Contract and Other Service Revenues - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Construction Contract Revenue        
Disaggregation of Revenue [Line Items]        
Deferred incremental costs incurred $ 0 $ 0 $ 0 $ 0