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Acquisitions - Narrative (Details) - USD ($) | Jan. 01, 2019 | Dec. 20, 2018
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$20 million Term loan, due February 1, 2024 |  |
Business Acquisition [Line Items] |  |
Debt term | 5 years | 5 years
Principal amount of debt | $ 20,000,000 | $ 20,000,000
American Stainless Tubing, Inc. |  |
Business Acquisition [Line Items] |  |
Purchase price | $ 21,900,000 |
American Stainless Tubing, Inc. | American Stainless |  |
Business Acquisition [Line Items] |  |
Period for which earn out payments will be received | 3 years |
American Stainless Tubing, Inc. | American Stainless | Earn-Out Payment |  |
Business Acquisition [Line Items] |  |
Earn out payment, target percentage | 6.50% |

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