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Segment information - Segment depreciation, depletion and amortization (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of operating segments [line items]      
Depreciation, depletion, and amortization $ 99,941 $ 91,079 $ 87,728
Operating segments | Florida business segment      
Disclosure of operating segments [line items]      
Depreciation, depletion, and amortization 60,296 57,000 55,655
Operating segments | Mid-Atlantic business segment      
Disclosure of operating segments [line items]      
Depreciation, depletion, and amortization 38,954 33,472 31,490
Operating segments | STET segment      
Disclosure of operating segments [line items]      
Depreciation, depletion, and amortization 675 591 576
Unallocated corporate      
Disclosure of operating segments [line items]      
Depreciation, depletion, and amortization $ 16 $ 16 $ 7