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SHAREHOLDERS' EQUITY (Details) - Class A common stock - $ / shares | Sep. 30, 2021 | Jul. 28, 2021 | Sep. 30, 2020
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Class of Stock [Line Items] |  |  |
Common stock, shares authorized (in shares) | 70,000,000 |  | 70,000,000
Common stock, par value (in dollars per share) | $ 1.00 |  | $ 1.00
Matthews Stock Repurchase Program |  |  |
Class of Stock [Line Items] |  |  |
Shares authorized for repurchase (in shares) |  | 2,500,000 |
Shares remaining for repurchase (in shares) | 2,658,627 |  |

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