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DIVESTITURE ACTIVITIES (Details) |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 06, 2021 USD ($) facility | Feb. 13, 2019 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Net gain on sale |  |  |  | $ 0 | $ 0 | $ 5,014,000 |
Divestiture | Test Systems |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Contingent earn-outs |  |  |  |  | $ 3,400,000 | $ 11,300,000 | $ 10,700,000
Divestiture | Test Systems | First Earnout |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Maximum total earnout proceeds |  | $ 35,000,000 |  |  |  |  |
Divestiture | Test Systems | Second Earnout |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Minimum total earnout proceeds |  | $ 0 |  |  |  |  |
Disposed of by Sale | Aerospace facilities |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Number of facilities sold | facility | 1 |  |  |  |  |  |
Held for sale | $ 9,200,000 |  |  |  |  |  |
Proceeds from sale of facilities | $ 8,800,000 |  |  |  |  |  |
Net gain on sale |  |  | $ 5,000,000 |  |  |  |

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