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LONG-TERM DEBT AND FINANCING ARRANGEMENTS - Interest rate swaps (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2020 | Jan. 02, 2020
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Interest rate swap agreement, maturing on June 30, 2022 |  |  |  |
Financing Arrangements |  |  |  |
Notional amount |  |  |  | $ 50.0
Fixed interest rate payments (as a percent) |  |  |  | 1.99%
Interest rate swap agreement, maturing on June 30, 2022 | Other long-term liabilities |  |  |  |
Financing Arrangements |  |  |  |
Fair value of interest rate swap, liability |  | $ 0.7 | $ 1.4 |
Interest rate swap agreement, maturing on June 30, 2022 | Credit Facility |  |  |  |
Financing Arrangements |  |  |  |
Amount of borrowings covered by the interest rate swap |  | $ 50.0 | $ 50.0 |
Effective fixed interest rate on hedged borrowings (as a percent) |  | 3.12% | 3.12% |
Amended interest rate swap agreement, maturing on October 1, 2024 |  |  |  |
Financing Arrangements |  |  |  |
Notional amount |  | $ 50.0 |  |
Fixed interest rate payments (as a percent) |  | 0.43% |  |
Amended interest rate swap agreement, maturing on October 1, 2024 | Other long-term liabilities |  |  |  |
Financing Arrangements |  |  |  |
Fair value of interest rate swap, liability |  |  | $ 0.2 |
Amended interest rate swap agreement, maturing on October 1, 2024 | Other long-term assets |  |  |  |
Financing Arrangements |  |  |  |
Fair value of interest rate swap, asset |  | $ 0.3 |  |
Amended interest rate swap agreement, maturing on October 1, 2024 | Credit Facility | Forecast |  |  |  |
Financing Arrangements |  |  |  |
Amount of borrowings covered by the interest rate swap | $ 50.0 |  |  |
Effective fixed interest rate on hedged borrowings (as a percent) | 1.56% |  |  |

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