Goodwill And Related Intangible Assets (Schedule Of Changes In Carrying Amount Of Goodwill) (Details) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Balance		$ 359,863,000	$ 348,326,000
Acquired goodwill		2,467,000	15,011,000
Adjustments to prior year acquisitions		252,000
Impairment	(2,454,000)	(21,040,000)	(4,328,000)	0
Foreign currency translation		(368,000)	854,000
Balance		341,174,000	359,863,000	348,326,000
Residential Products [Member]
Goodwill [Line Items]
Balance		193,043,000	192,834,000
Acquired goodwill		2,467,000	4,537,000
Adjustments to prior year acquisitions		10,000
Impairment			(4,328,000)
Balance		195,520,000	193,043,000
Industrial and Infrastructure Products [Member]
Goodwill [Line Items]
Balance		166,820,000	155,492,000
Acquired goodwill			10,474,000
Adjustments to prior year acquisitions		242,000
Impairment		(21,040,000)
Foreign currency translation		(368,000)	854,000
Balance		$ 145,654,000	$ 166,820,000