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SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands						2 Months Ended	12 Months Ended
	Nov. 20, 2021	Nov. 19, 2021	Oct. 19, 2021	Oct. 13, 2021	Oct. 01, 2021	Nov. 18, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Subsequent Event [Line Items]
Stock repurchased during period (in shares)							101,481	103,830
Loans and leases to held for sale							$ 188,638	$ 542,101	$ 99,992
Proceeds from held-for-sale loans							890,300	590,800
Allowance for credit losses released							57,273	41,761	$ 42,854
Community Banking
Subsequent Event [Line Items]
Allowance for credit losses released							$ 144	$ 0
Subsequent Event
Subsequent Event [Line Items]
Percent of eligible compensation contributed	6.00%	4.00%			6.00%
Stock repurchased during period (in shares)						1,252,145
Subsequent Event | Community Banking
Subsequent Event [Line Items]
Loans and leases to held for sale			$ 170,000
Proceeds from held-for-sale loans				$ 30,200
Allowance for credit losses released				$ 1,000

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The cash inflow resulting from the sale of loans classified as held-for-sale, including proceeds from loans sold through mortgage securitization.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions.

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