Goodwill and Related Intangible Assets (Schedule of Changes in Carrying Amount of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Balance at	$ 341,174us-gaap_Goodwill	$ 359,863us-gaap_Goodwill
Acquired goodwill		2,467us-gaap_GoodwillAcquiredDuringPeriod
Adjustments to prior year acquisitions		252
Impairment	(104,565)us-gaap_GoodwillImpairmentLoss	(21,040)us-gaap_GoodwillImpairmentLoss	(4,328)us-gaap_GoodwillImpairmentLoss
Foreign currency translation	(565)us-gaap_GoodwillTranslationAdjustments	(368)us-gaap_GoodwillTranslationAdjustments
Balance at	236,044us-gaap_Goodwill	341,174us-gaap_Goodwill	359,863us-gaap_Goodwill
Residential Products
Goodwill [Roll Forward]
Balance at	195,520	193,043
Acquired goodwill		2,467
Adjustments to prior year acquisitions		10
Impairment	(14,235)	0
Foreign currency translation	0	0
Balance at	181,285	195,520
Industrial and Infrastructure Products
Goodwill [Roll Forward]
Balance at	145,654	166,820
Acquired goodwill		0
Adjustments to prior year acquisitions		242
Impairment	(90,330)	(21,040)
Foreign currency translation	(565)	(368)
Balance at	$ 54,759	$ 145,654

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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