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Fair Value Measurements (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset impairments | $ 0 | $ 0 | $ 0
Inventory impairment | 2,000,000 | 6,700,000 |
Asset impairments | 4,363,000 | 7,672,000 | $ 0
Inventory scrap value | 200,000 |  |
Held for sale |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Impairment of asset held for sale | 2,400,000 | 1,000,000 |
Pre-Manufactured | Services |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset impairments | 82,000 |  |
Specialty and High-Grade Copper Nickel and Steel | Fabrication |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset impairments | $ 1,900,000 | 3,700,000 |
Specialty Piping and Valves | Fabrication |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset impairments |  | $ 2,900,000 |

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