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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Periods of Expected Insurance Payments

Based on historical payment patterns, we expect payments of undiscounted ultimate losses to be made as follows:

Year Ending September 30:
			2022						$			1,047
			2023									714
			2024									452
			2025									285
			2026									167
			Thereafter									601
Total									$			3,266

Accounts Receivable, Allowance for Credit Loss [Table Text Block]

Activity in our allowance for credit losses consists of the following:

			Year Ended September 30,
			2021						2020
Balance at beginning of period			$	2,613					$	1,184
Additions to costs and expenses, inclusive of ASU 2016-13 adoption adjustment			1,216						1,864
Deductions for uncollectible receivables written off, net of recoveries			(1,442)						(435)
Balance at end of period			$	2,387					$	2,613

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Tabular disclosure of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

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Tabular disclosure of the nature of the unusual risk or uncertainty, if estimable, such as the threat of expropriation of its assets by a foreign government, rapid technological obsolescence in the industry, risk of natural disaster from earthquake or weather events, and availability of or continuation of a labor force at a reasonable cost.

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