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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, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |
Inventory write-downs &/or asset impairment (recoveries) charges, net | $ 479 | $ 1,750 | $ 479 | $ 1,088
Exit activity costs | 3,504 | 1,910 | 5,859 | 2,264
Total exit activity costs & asset impairments | 3,983 | 3,660 | 6,338 | 3,352
Renewable Energy and Conservation |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Inventory write-downs &/or asset impairment (recoveries) charges, net | (9) | 0 | (9) | 84
Exit activity costs | 46 | (156) | 45 | (107)
Total exit activity costs & asset impairments | 37 | (156) | 36 | (23)
Residential Products |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Inventory write-downs &/or asset impairment (recoveries) charges, net | 478 | 1,392 | 478 | 1,349
Exit activity costs | 2,937 | 485 | 3,307 | 333
Total exit activity costs & asset impairments | 3,415 | 1,877 | 3,785 | 1,682
Industrial and Infrastructure Products |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Inventory write-downs &/or asset impairment (recoveries) charges, net | 10 | 358 | 10 | (345)
Exit activity costs | 275 | 1,417 | 1,588 | 1,607
Total exit activity costs & asset impairments | 285 | 1,775 | 1,598 | 1,262
Corporate |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Inventory write-downs &/or asset impairment (recoveries) charges, net | 0 | 0 | 0 | 0
Exit activity costs | 246 | 164 | 919 | 431
Total exit activity costs & asset impairments | $ 246 | $ 164 | $ 919 | $ 431

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