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Exit Activity Costs and Asset Impairments (Summary of Exit Activity Costs and Asset Impairments by Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Restructuring Cost and Reserve [Line Items] |  |  |  |
Inventory write-downs &/or asset impairment recoveries, net | $ 806 | $ 2,802 | $ (1,931) | $ 3,876
Exit activity costs | 761 | 963 | 6,706 | 2,696
Net asset impairment and exit activity charges (gains) | 1,567 | 3,765 | 4,775 | 6,572
Residential Products |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Inventory write-downs &/or asset impairment recoveries, net | 442 | 373 | 295 | 1,179
Exit activity costs | 566 | 207 | 958 | 677
Net asset impairment and exit activity charges (gains) | 1,008 | 580 | 1,253 | 1,856
Industrial and Infrastructure Products |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Inventory write-downs &/or asset impairment recoveries, net | 98 | 2,429 | (2,492) | 2,697
Exit activity costs | (12) | 756 | 2,959 | 2,019
Net asset impairment and exit activity charges (gains) | 86 | 3,185 | 467 | 4,716
Renewable Energy & Conservation |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Inventory write-downs &/or asset impairment recoveries, net | 266 | 0 | 266 | 0
Exit activity costs | 191 | 0 | 2,610 | 0
Net asset impairment and exit activity charges (gains) | 457 | 0 | 2,876 | 0
Corporate |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Inventory write-downs &/or asset impairment recoveries, net | 0 | 0 | 0 | 0
Exit activity costs | 16 | 0 | 179 | 0
Net asset impairment and exit activity charges (gains) | $ 16 | $ 0 | $ 179 | $ 0

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