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SHAREHOLDERS' EQUITY SHAREHOLDERS EQUITY - Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Stockholders' Equity Note [Abstract] |  |  |  |
Restricted stock | $ 3,930 | $ 3,332 | $ 10,742 | $ 9,687
ESOP | 577 | 715 | 2,067 | 1,860
Total stock based compensation | $ 4,507 | $ 4,047 | $ 12,809 | $ 11,547

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- Definition Amount of noncash expense for award of restricted stock or unit under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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