Treasury Stock - Narrative (Details) - USD ($)	3 Months Ended	6 Months Ended
Nov. 30, 2023	Aug. 31, 2023	Nov. 30, 2022	Aug. 31, 2022	Nov. 30, 2023	Jul. 19, 2023
Equity, Attributable to Parent [Abstract]
Authorized amount of stock to be repurchased	$ 150,000,000.0				$ 150,000,000.0	$ 100,000,000.0
Treasury stock, value acquired	52,300,000	$ 36,200,000	$ 26,000,000.0	$ 5,100,000	88,500,000
Excise tax on stock repurchased	$ 400,000				$ 700,000

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481549/505-30-45-1

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration