Facility Closures and Consolidations (Details) $ in Thousands	12 Months Ended
	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