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Detail of Certain Balance Sheet Accounts (Tables)

12 Months Ended

Sep. 30, 2019

Detail of Certain Balance Sheet Accounts [Abstract]

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

	Year Ended September 30,
	2019				2018
Balance at beginning of period	$	868			$	650
Additions to costs and expenses	552				515
Deductions for uncollectible receivables written off, net of recoveries	(236		)		(297		)
Balance at end of period	$	1,184			$	868

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

	Year Ended September 30,
	2019				2018
Accounts payable, trade	$	85,276			75,293
Accrued compensation and benefits	42,828				34,058
Accrued insurance liabilities	6,683				6,202
Other accrued expenses	18,122				15,038
	$	152,909			130,591

Schedule of Other Assets [Table Text Block]

	Year Ended September 30,
	2019				2018
Executive Savings Plan assets	$	763			$	747
Securities and equity investments	408				558
Other	3,767				4,760
Total	$	4,938			$	6,065

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- Definition

Detail of Certain Balance Sheet Accounts [Abstract]

+ References

No definition available.

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- Definition

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=119407570&loc=SL82919249-210447

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- Definition

Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses.

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- Definition

Tabular disclosure of the carrying amounts of other assets. This disclosure includes other current assets and other noncurrent assets.

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