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Basis of Presentation and Significant Accounting Policies (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Financing Receivable, Impaired [Line Items]          
Allowance for doubtful accounts against contracts receivable $ 0   $ 0   $ 0
Contract receivables, retainage 64,268,000   64,268,000   65,682,000
Contract liabilities, retainage $ 83,928,000   $ 83,928,000   63,848,000
Percentage of receivables estimated to be collected in next fiscal year 70.00%   70.00%    
Decrease in contract asset retainage     $ 2,476,000    
Increase in contract liability retainage     192,916,000    
Contract liability recognized during period $ 25,515,000   $ 172,941,000    
Contract liability revenue recognized   $ 10,942,000   $ 94,539,000  
Ownership interest in subsidiaries 50.00%   50.00%    
Total disability insurance policies, per policy amount $ 20,000,000   $ 20,000,000    
Restricted cash 0   0   $ 3,721,000
Variable Interest Entity, Primary Beneficiary | Myers          
Financing Receivable, Impaired [Line Items]          
Members’ interest subject to mandatory redemption $ 20,000,000   $ 20,000,000