CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021
CONDENSED CONSOLIDATED STATEMENTS OF EQUITY
Cash dividends paid per share (in dollars per share)			$ 1.00	$ 0.80
Change in funded status of pension plans, tax	$ 37	$ 41	$ 111	$ 124
Net unrealized gain (loss) on restricted investments, tax	$ 37	$ 24	$ 92	$ 63

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

Name:	us-gaap_CommonStockDividendsPerShareCashPaid
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration