| **Segment Data - Operating Results (Details) - USD ($) $ in Thousands** | 3 Months Ended | 6 Months Ended |
|-------------------------------------------------------------------------|----------------|----------------|
||
| **Segment Reporting Information [Line Items]**                          |           |           |   |   |
| Impairments and other charges                                           | $ 0            | $ 2,816        | $ 0 | $ 2,816 |
| Gain on insurance recovery                                              |           |           | 874 | 0 |
| Gain on legal settlement                                                |           |           | 600 |   |
| Total                                                                   | 2,812          | 6,092          | 4,791 | 9,339 |
| Fluids Systems                                                          |           |           |   |   |
| **Segment Reporting Information [Line Items]**                          |           |           |   |   |
| Facility exit costs and other, net                                      |           |           | 700 |   |
| Operating segments | Fluids Systems                                     |           |           |   |   |
| **Segment Reporting Information [Line Items]**                          |           |           |   |   |
| Fluids Systems sale process transaction expenses                        | 304            | 0              | 617 | 0 |
| Impairments and other charges                                           | 0              | 2,816          | 0 | 2,816 |
| Gain on insurance recovery                                              | 0              | 0              | (807) | 0 |
| Facility exit costs and other, net                                      | 741            | 2,107          | 741 | 4,399 |
| Severance costs                                                         | 36             | 148            | 551 | 1,103 |
| Total                                                                   | 1,081          | 5,071          | 1,102 | 8,318 |
| Operating segments | Industrial Solutions                               |           |           |   |   |
| **Segment Reporting Information [Line Items]**                          |           |           |   |   |
| Gain on insurance recovery                                              | 0              | 0              | (67) | 0 |
| Gain on legal settlement                                                | 0              | 0              | (550) | 0 |
| Severance costs                                                         | 175            | 92             | 693 | 92 |
| Total                                                                   | 175            | 92             | 76 | 92 |
| Corporate office                                                        |           |           |   |   |
| **Segment Reporting Information [Line Items]**                          |           |           |   |   |
| Fluids Systems sale process transaction expenses                        | 1,556          | 0              | 3,498 | 0 |
| Severance costs                                                         | 0              | 929            | 115 | 929 |
| Total                                                                   | $ 1,556        | $ 929          | $ 3,613 | $ 929 |

| X                                                                                                                                                                                                                                                                                                                       |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Disposal Group, Including Discontinued Operation, Transaction Expenses
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| - Definition
Other Operating Expense, Net
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| - Definition
Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.
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| - Definition
Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.
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| - Definition
Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.
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| - Definition
Amount of excess (deficiency) of insurance recovery over the loss incurred from an insured event.
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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| - Definition
Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.
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