Dividend (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	9 Months Ended
Aug. 03, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Common stock dividend
Dividend declared (in dollars per share)	$ 0.22	$ 0.22			$ 0.22	$ 0.66	$ 0.66
Dividend paid (in dollars per share)		$ 0.22	$ 0.22	$ 0.22	$ 0.22	$ 0.66	$ 0.66
Dividends paid		$ 2,794	$ 2,807	$ 2,796		$ 8,397	$ 8,329

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

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

+ References

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- References

No definition available.

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- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15

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