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RETIREMENT PLANS - FAIR VALUE (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Pension plan assets at the fair value |  |
Fair value measurements | $ 12,594 | $ 11,051
Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 12,594 | 11,051
Significant Other Observable Inputs (Level 2) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Significant Unobservable Inputs (Level 3) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Cash |  |
Pension plan assets at the fair value |  |
Fair value measurements | 25 |
Cash | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 25 |
Cash | Significant Other Observable Inputs (Level 2) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 |
Cash | Significant Unobservable Inputs (Level 3) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 |
Corporate bonds |  |
Pension plan assets at the fair value |  |
Fair value measurements | 1 | 1
Corporate bonds | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 1 | 1
Corporate bonds | Significant Other Observable Inputs (Level 2) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Corporate bonds | Significant Unobservable Inputs (Level 3) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Fixed income exchange-traded funds |  |
Pension plan assets at the fair value |  |
Fair value measurements | 3,809 | 5,762
Fixed income exchange-traded funds | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 3,809 | 5,762
Fixed income exchange-traded funds | Significant Other Observable Inputs (Level 2) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Fixed income exchange-traded funds | Significant Unobservable Inputs (Level 3) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Preferred securities |  |
Pension plan assets at the fair value |  |
Fair value measurements | 48 |
Preferred securities | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 48 |
Preferred securities | Significant Other Observable Inputs (Level 2) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 |
Preferred securities | Significant Unobservable Inputs (Level 3) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 |
Equity securities exchange-traded funds |  |
Pension plan assets at the fair value |  |
Fair value measurements | 459 | 352
Equity securities exchange-traded funds | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 459 | 352
Equity securities exchange-traded funds | Significant Other Observable Inputs (Level 2) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Equity securities exchange-traded funds | Significant Unobservable Inputs (Level 3) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Equities |  |
Pension plan assets at the fair value |  |
Fair value measurements | 8,252 | 4,936
Equities | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 8,252 | 4,936
Equities | Significant Other Observable Inputs (Level 2) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Equities | Significant Unobservable Inputs (Level 3) |  |
Pension plan assets at the fair value |  |
Fair value measurements | $ 0 | $ 0

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