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Goodwill and Other Intangible Assets Other Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2019 | Jun. 30, 2022 | Jun. 30, 2020 | Jun. 30, 2021
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  | $ 160,699 |  | $ 153,972
Intangible Assets, Gross (Excluding Goodwill) |  |  |  | 266,424 |  | 274,013
Goodwill and other Intangible Asset Impairment | $ 15,600 | $ 14,600 |  |  | $ 30,227 |
Goodwill |  |  |  | 264,230 | 270,580 | 277,615
WIDIA [Member] |  |  |  |  |  |
Goodwill, Impairment Loss | 13,700 | $ 13,100 |  |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 1,900 |  | $ 1,500 |  |  |
Metal Cutting [Member] |  |  |  |  |  |
Goodwill |  |  |  | 264,230 | $ 270,580 | 277,615
Technology-Based and other [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  |  | 31,592 |  | 33,632
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  | $ 22,734 |  | 24,413
Technology-Based and other [Member] | Minimum [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 4 years |  |
Technology-Based and other [Member] | Maximum [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 20 years |  |
Customer Relationships [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  |  | $ 180,263 |  | 183,338
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  | $ 104,698 |  | 98,901
Customer Relationships [Member] | Minimum [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 10 years |  |
Customer Relationships [Member] | Maximum [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 21 years |  |
Unpatented Technology [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  |  | $ 31,807 |  | 31,957
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  | $ 22,950 |  | 20,575
Unpatented Technology [Member] | Minimum [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 10 years |  |
Unpatented Technology [Member] | Maximum [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 30 years |  |
Trademarks [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  |  | $ 12,403 |  | 13,268
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  | $ 10,317 |  | 10,083
Trademarks [Member] | Minimum [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 5 years |  |
Trademarks [Member] | Maximum [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 20 years |  |
Trademarks [Member] |  |  |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  |  |  | $ 10,359 |  | $ 11,818

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