Income Taxes (Summary of Changes in Valuation Allowances for Deferred Tax Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Deferred Tax Assets [Abstract]
Balance at Beginning of Year	$ 57,645	$ 63,205	$ 0
Additions	0	0	63,205
Reversal of Valuation Allowance	57,645	5,560	0
Balance at End of Year	$ 0	$ 57,645	$ 63,205

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant