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Asset Impairment Charges (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Slater facility
Segment Reporting Information [Line Items]
Asset impairment charges		$ 7,900
Impairment of property, plant and equipment		6,600
Impairment of intangible		400
Inventory write-down		$ 900
Facilities in Lucas-Milhaupt Gliwice, Poland \| Joining materials
Segment Reporting Information [Line Items]
Asset impairment charges	$ 2,500
Impairment of property, plant and equipment	1,500
Inventory write-down	$ 500
Certain unused property, Norristown, PA
Segment Reporting Information [Line Items]
Impairment of real estate			$ 1,398
Toronto, Canada \| Joining materials
Segment Reporting Information [Line Items]
Asset impairment charges				$ 600
Atlanta, GA \| Kasco
Segment Reporting Information [Line Items]
Impairment of real estate				$ 600