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STOCK-BASED COMPENSATION - DEFERRED RETENTION STOCK/NON-EMPLOYEE DIRECTOR STOCK (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Scheduled to Vest Immediately | Director |  |  |
Shares |  |  |
Number of shares granted (in shares) | 27,696 | 26,165 | 26,524
Weighted Average Grant Date Fair Value |  |  |
Granted (in dollars per share) | $ 42.88 | $ 44.80 | $ 39.85
Total Fair Value of Vested Shares |  |  |
Compensation costs not yet recognized | $ 311 |  |
Deferred retention stock |  |  |
Shares |  |  |
Outstanding at beginning of period (in shares) | 243,561 | 242,082 | 672,578
Number of shares granted (in shares) | 42,358 | 167,407 | 24,167
Delivered (in shares) | (57,673) | (158,733) | (452,694)
Forfeited (in shares) |  | (7,195) | (1,969)
Outstanding at end of period (in shares) | 228,246 | 243,561 | 242,082
Weighted Average Grant Date Fair Value |  |  |
Outstanding at beginning of period (in dollars per share) | $ 44.67 | $ 32.99 | $ 29.54
Granted/Vested (in dollars per share) | 40.72 | 47.95 | 45.00
Delivered (in dollars per share) | 35.25 | 30.32 | 29.42
Forfeited (in dollars per share) |  | 44.41 | 35.56
Outstanding at end of period (in dollars per share) | $ 46.32 | $ 44.67 | $ 32.99
Total Fair Value of Vested Shares |  |  |
Delivered | $ 2,423 | $ 7,145 | $ 19,581

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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