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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 segment | Sep. 30, 2013
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Number of reportable segments |  |  | 2 |
Net sales: | $ 234,101 | $ 217,412 | $ 660,093 | $ 638,732
Income (loss) from operations: | 41,578 | 41,762 | 111,565 | 122,645
Unallocated Corporate Expenses | (1,876) | (2,344) | (9,069) | (15,322)
Total income (loss) from operations | 18,392 | (6,152) | 33,398 | 15,327
Residential Products |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Net sales: | 122,100 | 108,424 | 326,483 | 308,536
Income (loss) from operations: | 13,694 | 10,068 | 26,740 | 29,925
Industrial and Infrastructure Products |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Net sales: | 112,329 | 109,645 | 334,613 | 331,689
Income (loss) from operations: | 6,574 | (13,876) | 15,727 | 724
Intersegment Sales |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Net sales: | (328) | (657) | (1,003) | (1,493)
Intersegment Elimination | Industrial and Infrastructure Products |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Net sales: | $ 112,001 | $ 108,988 | $ 333,610 | $ 330,196

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