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Acquisition - Schedule of Revenue and Operating Earnings Related to Business Acquisition (Detail) - Battletown Acquisition [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Business Acquisition [Line Items]
Revenue	$ 1,735	$ 1,735
Operating Loss	$ (346)	$ (346)

X

- Definition

Business acquisition operating gain or loss.

+ References

No definition available.

+ Details

Name:	exp_BusinessAcquisitionOperatingGainOrLoss
Namespace Prefix:	exp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=exp_BattletownAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: