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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 segment | Jun. 30, 2013
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Number of reportable segments |  |  | 2 |
Net sales: | $ 234,960 | $ 224,519 | $ 425,992 | $ 421,320
Income from operations: | 40,123 | 44,706 | 69,987 | 80,883
Unallocated Corporate Expenses | (2,335) | (5,209) | (7,203) | (12,978)
Total operating profit | 14,730 | 16,283 | 15,063 | 21,479
Residential Products |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Net sales: | 117,400 | 110,448 | 204,383 | 200,112
Income from operations: | 11,089 | 13,219 | 13,182 | 19,857
Industrial and Infrastructure Products |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Net sales: | 117,938 | 114,577 | 222,284 | 222,044
Income from operations: | 5,976 | 8,273 | 9,084 | 14,600
Intersegment Sales |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Net sales: | (378) | (506) | (675) | (836)
Intersegment Elimination | Industrial and Infrastructure Products |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Net sales: | $ 117,560 | $ 114,071 | $ 221,609 | $ 221,208

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