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Business Segments (Schedule Of Reporting Sement Data To Consolidated Totals From Continuing Ops) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |
Equity in (loss) income of nonconsolidated investment | $ (413) | $ 1,282 | $ 1,316
Income (loss) from continuing operations, before income taxes | (50,577) | 39,060 | 44,138
Assets | 566,660 | 491,717 | 413,193
Depreciation and amortization | 26,674 | 12,577 | 10,002
Expenditures for Long-Lived Assets | 15,201 | 19,037 | 9,674
Net sales | 624,523 | 607,192 | 597,963
Long-lived assets of continuing operating activities | 126,745 | 74,802 | 50,109
Payments to Acquire Property, Plant, and Equipment | 14,913 | 17,056 | 9,674
Rail distribution products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 126,277 | 139,529 | 144,911
Rail Technologies products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 98,237 | 109,053 | 88,670
Piling Products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 94,853 | 111,182 | 140,302
Concrete products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 52,044 | 36,396 | 32,969
Test and inspection services [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 35,906 | 0 | 0
CXT concrete tie products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 35,740 | 52,562 | 44,108
Allegheny Rail Products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 35,155 | 45,008 | 36,666
Other products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 146,311 | 113,462 | 110,337
United States [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 522,404 | 498,025 | 495,710
Long-lived assets of continuing operating activities | 118,053 | 66,905 | 40,717
Canada [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 40,545 | 39,375 | 37,290
Long-lived assets of continuing operating activities | 6,186 | 7,440 | 8,833
United Kingdom [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 26,817 | 22,625 | 16,548
Other - Seg Reporting [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 34,757 | 47,167 | 48,415
Long-lived assets of continuing operating activities | 2,506 | 457 | 559
Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Income (loss) from continuing operations, before income taxes | (41,349) | 48,549 | 48,106
Assets | 544,272 | 473,218 | 381,446
Depreciation and amortization | 25,675 | 11,593 | 9,317
Expenditures for Long-Lived Assets | 9,836 | 15,446 | 7,648
Net sales | 624,523 | 607,192 | 597,963
Corporate, Non-Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Unallocated interest income | 206 | 530 | 659
Equity in (loss) income of nonconsolidated investment | (413) | 1,282 | 1,316
Unallocated corporate amounts | (11,489) | (12,039) | (5,980)
Assets | 28,209 | 26,788 | 40,774
Depreciation and amortization | 999 | 984 | 685
Expenditures for Long-Lived Assets | 5,077 | 1,610 | 2,026
Segment Reconciling Items, LIFO [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Inventory, LIFO Reserve, Effect on Income, Net | 2,468 | 738 | 37
Assets | (5,821) | (8,289) | (9,027)
Segment Reconciling Items, Financing Agreements [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Expenditures for Long-Lived Assets | $ 288 | $ 1,981 | $ 0

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