Goodwill and Related Intangible Assets (Schedule of Changes in Carrying Amount of Goodwill) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Goodwill [Line Items]
Balance at	$ 236,044,000
Foreign currency translation	(521,000)
Balance at	235,523,000
Residential Products
Goodwill [Line Items]
Balance at	181,285,000
Foreign currency translation	0
Balance at	181,285,000
Industrial and Infrastructure Products
Goodwill [Line Items]
Balance at	54,759,000
Foreign currency translation	(521,000)
Balance at	$ 54,238,000