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10-K Uncompleted Contracts - Schedule of costs, estimated earnings and billings on uncompleted contracts (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]        
Costs incurred on uncompleted contracts   $ 1,217,480 $ 1,190,922  
Estimated earnings   153,317 158,836  
Uncompleted contracts   1,370,797 1,349,758  
Less billings to date   (1,379,495) (1,360,101)  
Net contract assets (liabilities) $ 13,430 $ (8,698) $ (10,343) $ (13,456)