Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 280
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-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 606
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+ Details

Revenue - Schedule of Timing of Transfer (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue
Total net sales	$ 137,466	$ 145,345	$ 402,582	$ 408,867
Point in time
Disaggregation of Revenue
Total net sales	96,179	110,780	296,425	304,612
Over time
Disaggregation of Revenue
Total net sales	41,287	34,565	106,157	104,255
Rail, Technologies, and Services
Disaggregation of Revenue
Total net sales	79,498	86,866	247,715	242,866
Rail, Technologies, and Services \| Point in time
Disaggregation of Revenue
Total net sales	62,717	72,246	198,179	202,003
Rail, Technologies, and Services \| Over time
Disaggregation of Revenue
Total net sales	16,781	14,620	49,536	40,863
Infrastructure Solutions
Disaggregation of Revenue
Total net sales	57,968	58,479	154,867	166,001
Infrastructure Solutions \| Point in time
Disaggregation of Revenue
Total net sales	33,462	38,534	98,246	102,609
Infrastructure Solutions \| Over time
Disaggregation of Revenue
Total net sales	$ 24,506	$ 19,945	$ 56,621	$ 63,392