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Acquisition - Schedule of Revenue and Operating Earnings Related to Business Acquisition (Detail) - Stockton Terminal Acquisition [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Dec. 31, 2023 | Dec. 31, 2023
Business Acquisition [Line Items] |  |
Revenue | $ 11,247 | $ 32,529
Operating Loss | $ (56) | $ (2,106)

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- Definition Business acquisition operating gain or loss. + References No definition available. + Details
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Namespace Prefix: | exp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- 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

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- Definition Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |