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Inventories (Schedule of Inventory Current) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Inventory Disclosure [Abstract]    
Raw materials $ 65,639 $ 46,421
Work in process 31,138 4,527
Finished railcars 23,196 8,783
Parts inventory 5,049 4,586
Total inventories, net $ 125,022 $ 64,317