XML 58 R40.htm IDEA: XBRL DOCUMENT v3.10.0.1

Schedule of Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Inventory [Line Items]
Inventories	$ 241,000	$ 258,159
Raw Materials and Material-in-Progress [Member]
Inventory [Line Items]
Inventories	110,487	121,628
Finished Cement [Member]
Inventory [Line Items]
Inventories	26,004	24,089
Aggregates [Member]
Inventory [Line Items]
Inventories	8,083	7,787
Gypsum Wallboard [Member]
Inventory [Line Items]
Inventories	6,588	8,477
Paperboard [Member]
Inventory [Line Items]
Inventories	7,157	8,602
Frac Sand [Member]
Inventory [Line Items]
Inventories	1,785	1,696
Repair Parts and Supplies [Member]
Inventory [Line Items]
Inventories	74,084	79,878
Fuel and Coal [Member]
Inventory [Line Items]
Inventories	$ 6,812	$ 6,002

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

No definition available.

+ Details

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

X

- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=68049868&loc=d3e3927-108312

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_InventoryNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=exp_RawMaterialsAndMaterialInProgressMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=exp_FinishedCementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=exp_AggregatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=exp_GypsumWallboardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=exp_PaperboardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=exp_FracSandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=exp_RepairPartsAndSuppliesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=exp_FuelAndCoalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: