Revenue - Timing of Transfer (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue
Net Sales	$ 497,497	$ 513,620
Point in time
Disaggregation of Revenue
Net Sales	361,587	359,989
Over time
Disaggregation of Revenue
Net Sales	135,910	153,631
Rail, Technologies, and Services
Disaggregation of Revenue
Net Sales	300,592	299,749
Rail, Technologies, and Services | Point in time
Disaggregation of Revenue
Net Sales	241,759	232,880
Rail, Technologies, and Services | Over time
Disaggregation of Revenue
Net Sales	58,833	66,869
Precast Concrete Products
Disaggregation of Revenue
Net Sales	104,212	70,990
Precast Concrete Products | Point in time
Disaggregation of Revenue
Net Sales	43,069	21,351
Precast Concrete Products | Over time
Disaggregation of Revenue
Net Sales	61,143	49,639
Steel Products and Measurement
Disaggregation of Revenue
Net Sales	92,693	142,881
Steel Products and Measurement | Point in time
Disaggregation of Revenue
Net Sales	76,759	105,758
Steel Products and Measurement | Over time
Disaggregation of Revenue
Net Sales	$ 15,934	$ 37,123