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Goodwill and Other Intangible Assets
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets
Goodwill
Goodwill by segment is as follows:
December 31,
2024		December 31,
2023
 (in millions)
Construction Products$861.2 $516.1 
Engineered Structures480.1 437.6 
Transportation Products19.9 37.0 
$1,361.2 $990.7 
The increase in Construction Products goodwill during the year ended December 31, 2024 is primarily due to the acquisition of Stavola, partially offset by measurement period adjustments from the 2023 acquisitions and the divestiture of a single-location asphalt and paving business completed in April 2024. The increase in Engineered Structures goodwill during the year ended December 31, 2024 is due to the acquisition of Ameron. The decrease in Transportation Products goodwill during the year ended December 31, 2024 is due to the divestiture of the steel components business in August 2024. See Note 2 Acquisitions and Divestitures.
Intangible Assets
Intangibles, net consisted of the following:
December 31, 2024December 31, 2023
(in millions)
Intangibles with indefinite lives - Trademarks$43.8 $34.9 
Intangibles with definite lives:
Customer relationships169.1142.7
Permits178.1166.9
Other49.62.3
396.8311.9
Less accumulated amortization(102.3)(76.1)
294.5235.8
Intangible assets, net$338.3 $270.7 
Total amortization expense from intangible assets was $26.3 million, $20.9 million, and $19.7 million for the years ended December 31, 2024, 2023 and 2022, respectively. Expected future amortization expense of intangibles as of December 31, 2024 is as follows:
Amortization Expense
(in millions)
2025$26.7 
202622.7 
202720.5 
202820.5 
202920.1 
Thereafter184.0