Asset Acquisitions and Divestitures (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2020
Asset Acquisition [Abstract]
Total Consideration for Asset Acquisition					$ 506,300
Assets Held for Sale, Net					$ 53,400
Net Proceeds from Sale of Timber Properties			$ 0	$ 104,582
Gain on Sale of Timber Properties	$ 0	$ 0	$ 0	$ 51,066

The cash inflow to dispose of long-lived, physical assets and timber properties used for normal timber operations.

No definition available.

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- References

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- Definition

Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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- Definition

Amount of assets held-for-sale that are not part of a disposal group.

+ References

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- Definition

Amount of gain (loss) on sale or disposal of property used for growing and harvesting trees.

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