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Facility Closures and Consolidations (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) employees
Restructuring Cost and Reserve [Line Items] |  |  |
Loss on dispositions of assets | $ 1,080 | $ 1,870 | $ 2,330
Gain on sale of building | (1,080) | (1,870) | (2,330)
Facility Closing Reynosa, Mexico [Member] | Cost of Sales [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Future Lease Obligation, Net of Sublease Income | 2,300 |  |
Restructuring and Related Cost, Accelerated Depreciation | 1,200 |  |
Facility Closing Wolverhampton, United Kingdom [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Loss on dispositions of assets | 3,200 |  |
Facility Closing Wolverhampton, United Kingdom [Member] | Selling, General and Administrative Expenses [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Gain (Loss) on Disposition of Business | 3,500 |  |
Packaging segment Mexico facility closure and relocation [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total facility closure and move costs |  | 2,500 |
Severance Costs |  | 700 |
Accelerated depreciation and inventory write-downs |  | 800 |
Proceeds from Sale of Buildings | 2,800 |  |
Gain on sale of building | $ 2,500 |  |
Energy Branch Closures [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance Costs |  |  | 3,000
Non-cash fixed assets write-down |  |  | $ 1,400
Restructuring and Related Cost, Expected Number of Positions Eliminated | employees |  |  | 240
Future Lease Obligation, Net of Sublease Income |  | $ 400 |

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