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Business Segments - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Segment Reporting Information |  |  |  |
Net Sales | $ 140,796 | $ 148,034 | $ 265,116 | $ 263,522
Segment Operating Income | 4,504 | 6,349 | 6,787 | 6,852
Operating Segments |  |  |  |
Segment Reporting Information |  |  |  |
Net Sales | 140,796 | 148,034 | 265,116 | 263,522
Segment Operating Income | 9,049 | 9,379 | 14,434 | 11,411
Rail, Technologies, and Services |  |  |  |
Segment Reporting Information |  |  |  |
Net Sales | 85,594 | 91,616 | 168,217 | 156,000
Rail, Technologies, and Services | Operating Segments |  |  |  |
Segment Reporting Information |  |  |  |
Net Sales | 85,594 | 91,616 | 168,217 | 156,000
Segment Operating Income | 5,431 | 6,627 | 12,209 | 9,015
Infrastructure Solutions |  |  |  |
Segment Reporting Information |  |  |  |
Net Sales | 55,202 | 56,418 | 96,899 | 107,522
Infrastructure Solutions | Operating Segments |  |  |  |
Segment Reporting Information |  |  |  |
Net Sales | 55,202 | 56,418 | 96,899 | 107,522
Segment Operating Income | $ 3,618 | $ 2,752 | $ 2,225 | $ 2,396

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