Dividend (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	6 Months Ended
Apr. 28, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Common stock dividend
Dividend declared (in dollars per share)	$ 0.22	$ 0.22		$ 0.22	$ 0.44	$ 0.44
Dividend paid (in dollars per share)		$ 0.22	$ 0.22	$ 0.22	$ 0.44	$ 0.44
Dividends paid		$ 2,776	$ 2,811		$ 5,587	$ 5,604

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

Reference 1: 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 http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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- Definition

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

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

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