Goodwill and Related Intangible Assets (Narrative) (Details) $ in Thousands	1 Months Ended	9 Months Ended	12 Months Ended
	Oct. 31, 2015 reporting_unit	Sep. 30, 2013 USD ($)	Dec. 31, 2015 USD ($) reporting_unit	Dec. 31, 2014 USD ($) reporting_unit	Dec. 31, 2013 USD ($)	Oct. 31, 2014
Goodwill [Line Items]
Accumulated impairment losses | $			$ 255,530	$ 255,530
Goodwill impairment | $				$ (104,565)	$ (104,565)
Number of reporting units tested	11			4
Number of reporting units			12
Industrial and Infrastructure Products
Goodwill [Line Items]
Number of reporting units tested				1
Number of reporting units				2
Residential Products
Goodwill [Line Items]
Number of reporting units				2
Industrial Specialty Products
Goodwill [Line Items]
Goodwill impairment | $		$ (21,040)
Maximum
Goodwill [Line Items]
WACC	13.10%					13.60%
Minimum
Goodwill [Line Items]
WACC	11.30%					12.90%