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Dividends and Share Repurchases (Details) - $ / shares						3 Months Ended		6 Months Ended
	Oct. 15, 2022	Jul. 15, 2022	Apr. 15, 2022	Feb. 18, 2022	Jan. 15, 2022	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Subsequent Event [Line Items]
Cash dividends per share (in dollars per share)				$ 0.24		$ 0.24	$ 0.23	$ 0.47	$ 0.45
Stock repurchased (in shares)						4,684
Average cost per share (in dollars per share)						$ 34.65
Remaining shares authorized to be repurchased (in shares)						3,728,320		3,728,320
Preferred stock dividends declared (in dollars per share)					$ 12.1875
Depository dividends declared (in dollars per share)					$ 0.30468750
Forecast
Subsequent Event [Line Items]
Preferred stock dividends declared (in dollars per share)	$ 12.1875	$ 12.1875	$ 12.1875
Depository dividends declared (in dollars per share)	$ 0.30468750	$ 0.30468750	$ 0.30468750

X

- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

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-Publisher FASB
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-Topic 505
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Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

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The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of shares that have been repurchased during the period and are being held in treasury.

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