Quarterly report [Sections 13 or 15(d)]

Construction Contract and Other Service Revenues - Construction Contracts and Other Service Revenues by Compensation Arrangement (Details)

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Construction Contract and Other Service Revenues - Construction Contracts and Other Service Revenues by Compensation Arrangement (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Revenue [Line Items]        
Construction contract and other service revenues $ 6,766 $ 12,458 $ 12,807 $ 22,717
Cost-plus fee        
Disaggregation of Revenue [Line Items]        
Construction contract and other service revenues 2,339 1,836 3,948 2,907
Firm fixed price        
Disaggregation of Revenue [Line Items]        
Construction contract and other service revenues 2,263 5,536 4,005 11,813
Guaranteed maximum price        
Disaggregation of Revenue [Line Items]        
Construction contract and other service revenues 1,884 4,824 4,222 7,454
Other        
Disaggregation of Revenue [Line Items]        
Construction contract and other service revenues $ 280 $ 262 $ 632 $ 543