| **Segment Data - Disaggregated Revenues, Industrial Solutions Segment (Details) - USD ($) $ in Thousands** | 3 Months Ended | 9 Months Ended |
|------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Disaggregation of Revenue [Line Items]**                                                                 |           |           |   |   |
| Total revenues                                                                                             | $ 198,498      | $ 219,853      | $ 581,784 | $ 590,435 |
| Industrial Solutions                                                                                       |           |           |   |   |
| **Disaggregation of Revenue [Line Items]**                                                                 |           |           |   |   |
| Total revenues                                                                                             | 57,262         | 51,232         | 161,193 | 135,539 |
| Industrial Solutions | Rental revenues                                                                     |           |           |   |   |
| **Disaggregation of Revenue [Line Items]**                                                                 |           |           |   |   |
| Total revenues                                                                                             | 20,370         | 17,195         | 63,244 | 52,356 |
| Industrial Solutions | Service revenues                                                                    |           |           |   |   |
| **Disaggregation of Revenue [Line Items]**                                                                 |           |           |   |   |
| Total revenues                                                                                             | 17,695         | 15,731         | 51,130 | 41,915 |
| Industrial Solutions | Product sales revenues                                                              |           |           |   |   |
| **Disaggregation of Revenue [Line Items]**                                                                 |           |           |   |   |
| Total revenues                                                                                             | $ 19,197       | $ 18,306       | $ 46,819 | $ 41,268 |

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| X                                                                                                                                      |
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