Discontinued Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Tangible Asset Impairment Charges		$ 11,900
Bayou Welding Works
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill and Intangible Asset Impairment			$ 3,900
Goodwill and Intangible Asset Impairment, Net of Tax			2,400
Tangible Asset Impairment Charges			1,100
Tangible Asset Impairment Charges, Net of Tax			700
Closure charges of welding business			$ 100	$ 0	$ 0	$ (5,019)
General and administrative expense	$ 1,400				1,400
Operating loss				$ 0	$ (6,008)	$ (11,247)
Bayou Welding Works | Goodwill and Intagible Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment Effect on Earnings Per Share, after Tax (in Dollars per share)			$ 0.06
Bayou Welding Works | Tangible Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment Effect on Earnings Per Share, after Tax (in Dollars per share)			$ 0.02