Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 segment	Mar. 31, 2013
Segment Reporting, Other Significant Reconciling Item [Line Items]
Number of reportable segments	2
Net sales	$ 191,032	$ 196,801
Income (loss) from operations	29,864	36,177
Unallocated Corporate Expenses	(4,868)	(7,769)
Income from operations	333	5,196
Residential Products [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales	86,983	89,664
Income (loss) from operations	2,093	6,638
Industrial and Infrastructure Products [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales	104,346	107,467
Income (loss) from operations	3,108	6,327
Less: Intersegment Sales [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales	(297)	(330)
Intersegment Elimination [Member] | Industrial and Infrastructure Products [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales	$ 104,049	$ 107,137