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STOCKHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2020 | Mar. 31, 2019 | Nov. 20, 2019
Class of Stock [Line Items] |  |  |  |
Treasury Stock, Shares, Acquired | 2,598,194 | 3,497,565 |  |
Stock repurchased during the period (in shares) |  | 88,784 | 89,775 |
Stock repurchased during the period, value |  | $ 2.9 | $ 3.0 |
Treasury Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Average cost per share (in dollars per share) | $ 34.71 | $ 34.53 |  |
Common Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Common stock, shares authorized (in shares) |  |  |  | 7,500,000

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