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Inventories (Schedule of Inventory Current) (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Inventory Disclosure [Abstract]    
Raw materials $ 75,249 $ 65,639
Work in process 21,703 31,138
Finished railcars 7,712 23,196
Parts inventory 5,114 5,049
Total inventories, net $ 109,778 $ 125,022