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STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS - Narrative (Details) | Jun. 10, 2020 | Sep. 30, 2020 USD ($) shares | Sep. 30, 2019 USD ($)
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Share-based Payment Arrangement [Abstract] |  |  |
Stock split ratio, common stock | 0.05 |  |
Number of shares available for issuance (in shares) | shares |  | 100,500,000 |
Authorized repurchase amount | $ |  |  | $ 300,000,000.0
Value of common stock remaining available for repurchase | $ |  | $ 245,000,000.0 |
Number of shares available for future issuance (in shares) | shares |  | 2,899,062 |

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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