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Dividends and Share Repurchases (Details) - $ / shares |  |  |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 15, 2022 | Jul. 15, 2022 | Jun. 03, 2022 | Apr. 15, 2022 | Jan. 15, 2022 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Cash dividends per share (in dollars per share) |  |  | $ 0.24 |  |  | $ 0.24 | $ 0.23 | $ 0.71 | $ 0.68
Stock repurchased (in shares) |  |  |  |  |  | 2,446 |  |  |
Average cost per share (in dollars per share) |  |  |  |  |  | $ 31.36 |  |  |
Remaining shares authorized to be repurchased (in shares) |  |  |  |  |  | 3,725,874 |  | 3,725,874 |
Preferred stock dividends declared (in dollars per share) |  |  |  | $ 12.1875 | $ 12.1875 |  |  |  |
Depository dividends declared (in dollars per share) |  |  |  | $ 0.30468750 | $ 0.30468750 |  |  |  |
Forecast |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock dividends declared (in dollars per share) | $ 12.1875 | $ 12.1875 |  |  |  |  |  |  |
Depository dividends declared (in dollars per share) | $ 0.30468750 | $ 0.30468750 |  |  |  |  |  |  |

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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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