Quarterly report pursuant to Section 13 or 15(d)

Construction Contract and Other Service Revenues (Details 1)

v3.19.1
Construction Contract and Other Service Revenues (Details 1) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues $ 16,950 $ 27,198
Construction    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 16,489 25,915
Design    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 252 1,064
Other    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 209 219
Guaranteed Maximum Price    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 12,356 20,486
Firm fixed price    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 2,325 6,435
Cost-plus fee    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues 2,060 58
Other    
Disaggregation of Revenue [Line Items]    
Construction contract and other service revenues $ 209 $ 219