v3.26.1
Revenue - Schedule of Type of customer (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 10, 2023
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
Jun. 30, 2026
USD ($)
customer
Jun. 30, 2025
USD ($)
Disaggregation of Revenue [Line Items]            
Contract revenues   $ 221,878 $ 205,286   $ 438,179 $ 393,939
Dragados/Hawaiian Dredging/Orion Joint Venture            
Disaggregation of Revenue [Line Items]            
Contract revenues   20,900 33,300   35,300 66,600
Contract awarded $ 469,300          
Contract revenues            
Disaggregation of Revenue [Line Items]            
Contract revenues   221,878 205,286   438,179 393,939
Federal Government            
Disaggregation of Revenue [Line Items]            
Contract revenues   40,113 39,429   69,839 81,313
State Governments            
Disaggregation of Revenue [Line Items]            
Contract revenues   36,886 36,322   72,544 65,283
Local Governments            
Disaggregation of Revenue [Line Items]            
Contract revenues   34,322 43,127   61,942 80,164
Private Companies            
Disaggregation of Revenue [Line Items]            
Contract revenues   $ 110,557 $ 86,408   $ 233,854 $ 167,179
Customer concentration risk | Contract revenues            
Disaggregation of Revenue [Line Items]            
Concentration Risk, Percentage   100.00% 100.00%   100.00% 100.00%
Number of customers exceeding the 10% benchmark percentage | customer         0  
Customer concentration risk | Federal Government | Contract revenues            
Disaggregation of Revenue [Line Items]            
Concentration Risk, Percentage   18.00% 19.00%   16.00% 21.00%
Customer concentration risk | Federal Government | Contract revenues | US Navy            
Disaggregation of Revenue [Line Items]            
Concentration Risk, Percentage     16.00%     17.00%
Customer concentration risk | State Governments | Contract revenues            
Disaggregation of Revenue [Line Items]            
Concentration Risk, Percentage   17.00% 18.00%   17.00% 17.00%
Customer concentration risk | Local Governments | Contract revenues            
Disaggregation of Revenue [Line Items]            
Concentration Risk, Percentage   15.00% 21.00%   14.00% 20.00%
Customer concentration risk | Private Companies | Contract revenues            
Disaggregation of Revenue [Line Items]            
Concentration Risk, Percentage   50.00% 42.00%   53.00% 42.00%
Geographic concentration | Contract revenues | Foreign            
Disaggregation of Revenue [Line Items]            
Concentration Risk, Percentage       6.00% 2.00% 6.00%