Exit Activity Costs and Asset Impairments (Schedule Of Asset Impairment Charges Related To Restructuring Activities) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Inventory write-downs &/or asset impairment charges	$ 8,504,000	$ 208,000	$ 1,616,000
Exit activity costs	1,418,000	2,126,000	1,018,000
Gain on sale leaseback	6,799,000	663,000
Total exit activity costs & asset impairments	3,123,000	1,671,000	2,634,000
Residential Products | Operating Segments
Restructuring Cost and Reserve [Line Items]
Inventory write-downs &/or asset impairment charges	6,495,000	83,000	1,616,000
Exit activity costs	1,256,000	1,332,000	905,000
Gain on sale leaseback	6,799,000	663,000
Total exit activity costs & asset impairments	952,000	752,000	2,521,000
Industrial and Infrastructure Products | Operating Segments
Restructuring Cost and Reserve [Line Items]
Inventory write-downs &/or asset impairment charges	2,009,000	125,000	0
Exit activity costs	162,000	794,000	113,000
Gain on sale leaseback	0	0
Total exit activity costs & asset impairments	$ 2,171,000	$ 919,000	$ 113,000