Texas Industries 10-Q 4 Apr 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Feb. 28, 2014	Mar. 31, 2014
Document Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	28-Feb-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'TXI	'
Entity Registrant Name	'TEXAS INDUSTRIES INC	'
Entity Central Index Key	'0000097472	'
Current Fiscal Year End Date	'--05-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	28,826,702

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Feb. 28, 2014	31-May-13
In Thousands, unless otherwise specified
CURRENT ASSETS	'	'
Cash and cash equivalents	$47,833	$61,296
Receivables – net	126,811	126,922
Inventories	107,910	105,054
Deferred income taxes and prepaid expenses	20,057	27,294
TOTAL CURRENT ASSETS	302,611	320,566
PROPERTY, PLANT AND EQUIPMENT	'	'
Land and land improvements	174,781	172,780
Buildings	51,549	50,968
Machinery and equipment	1,651,573	1,647,460
Construction in progress	25,854	16,642
TOTAL PROPERTY, PLANT AND EQUIPMENT (Gross)	1,903,757	1,887,850
Less depreciation and depletion	710,902	661,454
TOTAL PROPERTY, PLANT AND EQUIPMENT	1,192,855	1,226,396
OTHER ASSETS	'	'
Goodwill	40,072	40,575
Real estate and investments	31,780	29,471
Deferred other charges	19,712	18,817
TOTAL OTHER ASSETS	91,564	88,863
TOTAL ASSETS	1,587,030	1,635,825
CURRENT LIABILITIES	'	'
Accounts payable	71,584	69,061
Accrued interest, compensation and other	43,237	62,336
Current portion of long-term debt	2,036	1,872
TOTAL CURRENT LIABILITIES	116,857	133,269
LONG-TERM DEBT	656,797	657,935
DEFERRED INCOME TAXES AND OTHER CREDITS	81,288	91,157
SHAREHOLDERS' EQUITY	'	'
Common stock, $1 par value; authorized 100,000 shares; issued and outstanding 28,804 and 28,572 shares, respectively	28,804	28,572
Additional paid-in capital	528,754	514,560
Retained earnings	189,707	228,686
Accumulated other comprehensive loss	-15,177	-18,354
TOTAL SHAREHOLDERS' EQUITY	732,088	753,464
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$1,587,030	$1,635,825

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Feb. 28, 2014	31-May-13
In Thousands, except Per Share data, unless otherwise specified
Common stock, par value	$1	$1
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	28,804	28,572
Common stock, shares outstanding	28,804	28,572

Consolidated_Statements_Of_Ope

Consolidated Statements Of Operations (USD $)	3 Months Ended				9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Feb. 28, 2014		Feb. 28, 2013		Feb. 28, 2014		Feb. 28, 2013
NET SALES	$207,828		$141,359		$649,802		$483,575
Cost of products sold	195,835		129,035		592,986		444,297
GROSS PROFIT	11,993		12,324		56,816		39,278
Selling, general and administrative	18,264		17,056		56,471		51,679
Merger Charges	2,863		0		2,863		0
Interest expense	17,409		7,227		52,203		22,462
Other income, net	-1,696		-2,091		-12,959		-6,614
LOSS BEFORE INCOME TAXES FROM CONTINUING OPERATIONS	-24,847		-9,868		-41,762		-28,249
Income taxes (benefit)	-3,078		-1,355		-2,783		-2,151
NET LOSS FROM CONTINUING OPERATIONS	-21,769		-8,513		-38,979		-26,098
NET INCOME FROM DISCONTINUED OPERATIONS	0		2,699		0		6,504
NET LOSS	($21,769)		($5,814)		($38,979)		($19,594)
NET LOSS PER SHARE FROM CONTINUING OPERATIONS:	'		'		'		'
Basic (in USD per share)	($0.76)		($0.30)		($1.36)		($0.93)
Diluted (in USD per share)	($0.76)		($0.30)		($1.36)		($0.93)
NET INCOME PER SHARE FROM DISCONTINUED OPERATIONS:	'		'		'		'
Basic (in USD per share)	$0		$0.09		$0		$0.23
Diluted (in USD per share)	$0		$0.09		$0		$0.23
NET LOSS PER SHARE:	'		'		'		'
Basic (in USD per share)	($0.76)		($0.21)		($1.36)		($0.70)
Diluted (in USD per share)	($0.76)		($0.21)		($1.36)		($0.70)
AVERAGE SHARES OUTSTANDING	'		'		'		'
Basic (in shares)	28,696		28,190		28,629		28,073
Diluted (in shares)	28,696	[1]	28,190	[1]	28,629	[1]	28,073	[1]
[1]	Shares excluded due to antidilutive effect of stock options, restricted shares and awards

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Net loss	($21,769)	($5,814)	($38,979)	($19,594)
Other comprehensive income	'	'	'	'
Unrealized actuarial gain (loss) of defined benefit plans net of tax expense (benefit) of $1,813, $0, $1,813 and $(32), respectively	3,144	0	3,144	-55
Reclassification of actuarial loss of defined benefit plans, net of tax benefit of $(6), $(55) , $(19) and $(355), respectively	13	96	33	616
Total other comprehensive income	3,157	96	3,177	561
Comprehensive loss	($18,612)	($5,718)	($35,802)	($19,033)

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Loss (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Unrealized actuarial loss of defined benefit plans, tax	$1,813	$0	$1,813	($32)
Reclassification of actuarial loss of defined benefit plans, tax	($6)	($55)	($19)	$355

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013
OPERATING ACTIVITIES	'	'
Net loss	($38,979)	($19,594)
Adjustments to reconcile net loss to cash provided (used) by operating activities	'	'
Depreciation, depletion and amortization	58,556	42,968
Gain on asset disposals	-6,133	-4,822
Deferred income tax expense (benefit)	1,755	1,025
Stock-based compensation expense	5,349	7,015
Other – net	-9,942	-7,555
Changes in operating assets and liabilities	'	'
Receivables – net	-1,381	830
Inventories	-3,072	-710
Prepaid expenses	2,632	-2,158
Accounts payable and accrued liabilities	-9,450	-7,228
Net cash provided (used) by operating activities	-665	9,771
INVESTING ACTIVITIES	'	'
Capital expenditures – expansions	-7,125	-61,344
Capital expenditures – other	-26,152	-17,752
Proceeds from asset disposals	8,390	5,783
Proceeds from insurance contracts, net of premiums paid	4,386	2,366
Other – net	0	-67
Net cash used by investing activities	-20,501	-71,014
FINANCING ACTIVITIES	'	'
Debt payments	-1,373	-2,236
Stock option exercises	9,076	7,116
Net cash provided by financing activities	7,703	4,880
Decrease in cash and cash equivalents	-13,463	-56,363
Cash and cash equivalents at beginning of period	61,296	88,027
Cash and cash equivalents at end of period	$47,833	$31,664

Nature_Of_Operations

Nature Of Operations	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Nature Of Operations	'
	Texas Industries, Inc. and subsidiaries is a leading supplier of heavy construction materials in the southwestern United States through our three business segments: cement, aggregates and concrete. Our principal products are gray portland cement, produced and sold through our cement segment; stone, sand and gravel, produced and sold through our aggregates segment; and ready-mix concrete, produced and sold through our concrete segment. Our facilities are concentrated primarily in Texas, Louisiana and California. When used in these notes the terms “Company,” “we,” “us” or “our” mean Texas Industries, Inc. and subsidiaries unless the context indicates otherwise.
	We have changed the name of our "consumer products" segment to "concrete". This change impacts only the name of the segment to better reflect the business activity that occurs within the segment, and does not impact or change the financial information that we report through this segment.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Summary of Significant Accounting Policies	'
	Summary of Significant Accounting Policies
	The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and notes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the nine-month period ended February 28, 2014 are not necessarily indicative of the results that may be expected for the year ending May 31, 2014. For further information, refer to the consolidated financial statements and notes thereto included in the Annual Report on Form 10-K of Texas Industries, Inc. for the year ended May 31, 2013.
	Principles of Consolidation. The consolidated financial statements include the accounts of Texas Industries, Inc. and all subsidiaries except for a joint venture in which the Company has a 40% equity interest. The joint venture is accounted for using the equity method. Certain amounts in the prior period financial statements have been reclassified to conform to the current period presentation.
	Discontinued Operations. The prior period consolidated financial statements in this Form 10-Q reflect discontinued operations as discussed in Note 2 - Discontinued Operations.
	Estimates. The preparation of financial statements and accompanying notes in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported. Actual results could differ from those estimates.
	Fair Value of Financial Instruments. The estimated fair value of each class of financial instrument as of February 28, 2014 and May 31, 2013 approximates its carrying value except for long-term debt having fixed interest rates. The fair value of our long-term debt is estimated based on broker/dealer quoted market prices, which are level two inputs. As of February 28, 2014, the fair value of our long-term debt, including the current portion, was approximately $762.8 million compared to the carrying amount of $658.8 million. As of May 31, 2013, the fair value of our long-term debt, including the current portion, was approximately $723.2 million compared to the carrying amount of $659.8 million.
	Cash and Cash Equivalents. Investments with maturities of less than 90 days when purchased are classified as cash equivalents and consist primarily of money market funds and investment grade commercial paper issued by major corporations and financial institutions.
	Receivables. Management evaluates the ability to collect accounts receivable based on a combination of factors. A reserve for doubtful accounts is maintained based on the length of time receivables are past due or the status of a customer’s financial condition. If we are aware of a specific customer’s inability to make required payments, specific amounts are added to the reserve.
	Environmental Liabilities. We are subject to environmental laws and regulations established by federal, state and local authorities, and make provision for the estimated costs related to compliance when it is probable that an estimable liability has been incurred.
	Legal Contingencies. We are a defendant in lawsuits which arose in the normal course of business and make provision for the estimated loss from any claim or legal proceeding when it is probable that an estimable liability has been incurred.
	Inventories. Inventories are stated at the lower of cost or market. We use the last-in, first out (“LIFO”) method to value finished products, work in process and raw material inventories, excluding natural aggregate inventories. We use the average cost method to value natural aggregate finished goods and raw materials, and parts and supplies, which includes emission allowance credits. Our natural aggregate inventory includes a reserve against volumes in excess of an average twelve-month period of actual sales.
	We recognize the emission allowance credits issued by the California Air Resources Board (CARB) at zero cost and average them with the cost of additional credits that we purchase from state approved sources.
	Long-lived Assets. Management reviews long-lived assets on a facility by facility basis for impairment whenever changes in circumstances indicate that the carrying amount of the assets may not be recoverable and would record an impairment charge if necessary. Such evaluations compare the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset and are significantly impacted by estimates of future prices for our products, capital needs, economic trends and other factors. Estimates of future cash flows reflect Management’s belief that it operates in a cyclical industry.
	Property, plant and equipment is recorded at cost. Costs incurred to construct certain long-lived assets include capitalized interest which is amortized over the estimated useful life of the related asset. Interest is capitalized during the construction period of qualified assets based on the average amount of accumulated expenditures and the weighted average interest rate applicable to borrowings outstanding during the period. If accumulated expenditures exceed applicable borrowings outstanding during the period, capitalized interest is allocated to projects under construction on a pro rata basis. Provisions for depreciation are computed generally using the straight-line method. Useful lives for our primary operating facilities range from 10 to 25 years with certain cement facility structures having useful lives of 40 years. Provisions for depletion of mineral deposits are computed on the basis of the estimated quantity of recoverable raw materials. The costs of removing overburden and waste materials to access mineral deposits are referred to as stripping costs. All production phase stripping costs are recognized as costs of the inventory produced during the period the stripping costs are incurred. Maintenance and repairs are charged to expense as incurred.
	Goodwill and Goodwill Impairment. Management tests goodwill for impairment annually by reporting unit in the fourth quarter of our fiscal year. Management may make optional use of the qualitative assessment provided by the accounting guidance as part of its annual testing. The accounting guidance permits an entity to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If this is concluded to be the case then management would proceed with the quantitative impairment test using a two-step process. Otherwise, the quantitative impairment test is not required.
	The first step of the quantitative impairment test identifies potential impairment by comparing the fair value of a reporting unit to its carrying value including goodwill. In applying a fair-value based test, estimates are made of the expected future cash flows to be derived from the reporting unit. Similar to the review for impairment of other long-lived assets, the resulting fair value determination is significantly impacted by estimates of future prices for our products, capital needs, economic trends and other factors. If the carrying value of the reporting unit exceeds its fair value, the second step of the quantitative impairment test is performed to measure the amount of impairment loss, if any. The second step of the impairment test compares the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill. If the carrying value of the reporting unit goodwill exceeds the implied fair value of the goodwill, an impairment loss is recognized in an amount equal to that excess. The implied fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination.
	Goodwill resulting primarily from the acquisition of ready-mix operations in Texas and Louisiana and identified with our concrete operations has a carrying value of $40.1 million at February 28, 2014 and $40.6 million at May 31, 2013.
	Income Taxes. Texas Industries, Inc. (the parent company) joins in filing a consolidated return with its subsidiaries based on federal and certain state tax filing requirements. Certain subsidiaries also file separate state income tax returns. Current and deferred tax expense is allocated among the members of the group based on a stand-alone calculation of the tax of the individual member. We recognize and classify deferred income taxes using an asset and liability method, whereby deferred tax assets and liabilities are recognized based on the tax effect of temporary differences between the financial statements and the tax basis of assets and liabilities, as measured by current enacted tax rates.
	We calculate our current and deferred tax provision based on estimates and assumptions that could differ from the actual results reflected in income tax returns filed during subsequent years. Adjustments based on filed returns are generally recorded in the year the tax returns are filed.
	The amount of income tax we pay is subject to ongoing audits by federal and state authorities which may result in proposed assessments. Our estimate of the potential outcome for any uncertain tax issue is highly judgmental. We account for these uncertain tax issues using a two-step approach to recognizing and measuring uncertain tax positions taken or expected to be taken in a tax return. The first step determines if the weight of available evidence indicates that it is more likely than not that the tax position will be sustained on audit, including resolution of any related appeals or litigation processes. The second step measures the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. We adjust reserves for our uncertain tax positions due to changing facts and circumstances, the closing of a tax audit, judicial rulings, or realization of earnings or deductions that differ from our estimates. To the extent that the final outcome of these matters differs from the amounts recorded, such differences generally will impact our provision for income taxes in the period in which such a determination is made. Our provisions for income taxes include the impact of reserve provisions and changes to reserves that are considered appropriate including related interest and penalties.
	Management reviews our deferred tax position and in particular our deferred tax assets whenever circumstances indicate that the assets may not be realized in the future and recognizes a valuation allowance unless such deferred tax assets are deemed more likely than not to be recoverable. The ultimate realization of these deferred tax assets is dependent upon various factors including the generation of taxable income during future periods. In determining the need for a valuation allowance, we consider such factors as historical earnings, the reversal of existing temporary differences, prior taxable income (if carryback is permitted under the tax law), prudent and feasible tax planning strategies, and future taxable income. In the event we were to determine that we would not be able to realize all or part of our net deferred tax assets in the future, an adjustment to the deferred tax assets valuation allowance would be charged to earnings in the period in which we make such a determination. If we later determine that it is more likely than not that the net deferred tax assets would be realized, we would reverse the applicable portion of the previously provided valuation allowance as an adjustment to earnings at such time. See further discussion in Note 9.
	Real Estate and Investments. Surplus real estate and real estate acquired for development of high quality industrial, office or multi-use parks totaled $6.6 million at February 28, 2014 and $7.3 million at May 31, 2013.
	Investments include life insurance contracts purchased in connection with certain of our benefit plans. The contracts, recorded at their net cash surrender value, totaled $1.6 million (net of distributions of $97.6 million plus accrued interest and fees) at February 28, 2014 and $1.1 million (net of distributions of $99.8 million plus accrued interest and fees) at May 31, 2013. We can elect to receive distributions chargeable against the cash surrender value of the policies in the form of borrowings or withdrawals or we can elect to surrender the policies and receive their net cash surrender value.
	Investments include the long-term portion of a note receivable totaling $6.7 million at February 28, 2014 and $6.2 million at May 31, 2013 in connection with the sale of our expanded shale and clay lightweight aggregates manufacturing businesses related to certain inventories.
	Investment in Joint Venture. We own a 40% equity interest in a joint venture based in Waco, Texas that operates ready-mix plants serving the central Texas market. The day to day business operations are managed by the 60% partner in the venture. We supply cement to the joint venture. The debt of the joint venture is secured by the underlying assets of the joint venture. In addition, our partner has guaranteed 100% of the debt of the joint venture. We were released in the second quarter of fiscal year 2014 from our 50% guarantee of the debt of the joint venture. See further discussion of joint venture debt under Guarantee of Joint Venture Debt in Note 4.
	Our investment totaled $16.9 million at February 28, 2014 and $14.9 million at May 31, 2013. Our equity in income of the joint venture was $2.6 million and $1.6 million for the nine-month periods ended February 28, 2014 and 2013, respectively.
	Deferred Other Charges. Deferred other charges totaled $19.7 million at February 28, 2014 and $18.8 million at May 31, 2013. These balance totals include debt issuance costs of $9.7 million at February 28, 2014 and $11.1 million at May 31, 2013, which amortize over the term of the related debt. Also, these charges include $5.7 million and $2.9 million representing various miscellaneous receivables as of February 28, 2014 and May 31, 2013, respectively.
	Deferred Taxes and Other Credits. Deferred taxes and other credits totaled $81.3 million at February 28, 2014 and $91.2 million at May 31, 2013 and are composed primarily of liabilities related to our deferred income taxes, retirement plans, deferred compensation agreements and asset retirement obligations.
	Asset Retirement Obligations. We record a liability for legal obligations associated with the retirement of our long-lived assets in the period in which it is incurred if an estimate of fair value of the obligation can be made. The discounted fair value of the obligations incurred in each period is added to the carrying amount of the associated assets and depreciated over the lives of the assets. The liability accretes at the end of each period through a charge to operating expense. A gain or loss on settlement is recognized if the obligation is settled for other than the carrying amount of the liability.
	We incur legal obligations for asset retirement as part of our normal operations related to land reclamation, plant removal and Resource Conservation and Recovery Act closures. Determining the amount of an asset retirement liability requires estimating the future cost of contracting with third parties to perform the obligation. The estimate is significantly impacted by, among other considerations, management’s assumptions regarding the scope of the work required, labor costs, inflation rates, market-risk premiums and closure dates.
	Changes in asset retirement obligations are as follows:
		Nine months ended
		February 28,			February 28,
	In thousands	2014			2013
	Balance at beginning of period	$	2,653		$	3,879
	Additions	83			219
	Accretion expense	212			130
	Settlements	(354		)	(1,617		)
	Balance at end of period	$	2,594		$	2,611
	Accumulated Other Comprehensive Loss. Amounts recognized in accumulated other comprehensive loss represent adjustments related to a defined benefit retirement plan and a postretirement health benefit plan covering approximately 600 employees and retirees of our California cement subsidiary. The amounts totaled $15.2 million (net of tax benefit of $0.7 million) at February 28, 2014 and $18.4 million (net of tax benefit of $2.5 million) at May 31, 2013. We report the effect of significant reclassifications out of accumulated other comprehensive loss on the respective line items in net income if the amount being reclassified represents the entirety of an item. The pre-tax reclassification for the nine-month periods ended February 28, 2014, and 2013 were less than $0.1 million and $1.0 million, respectively, and affected salaries and employee benefits expense which is allocated to costs of products sold and to selling, general, and administrative in the consolidated statement of operations.
	Net Sales. Sales are recognized when title has transferred and products are delivered. We include delivery fees in the amount we bill customers to the extent needed to recover our cost of freight and delivery. Net sales are presented as revenues and include these delivery fees.
	Other Income. Routine sales of surplus operating assets and real estate resulted in gains of $0.3 million and $1.9 million in the three-month periods ended February 28, 2014 and 2013, respectively, and $6.1 million and $4.8 million in the nine-month periods ended February 28, 2014 and 2013, respectively. In addition, other income includes earnings from a joint venture of $0.8 million and $0.5 million in the three-month periods ended February 28, 2014 and 2013, respectively, and $2.6 million and $1.6 million in the nine-month periods ended February 28, 2014 and 2013, respectively.
	Merger Charges. Merger related expenses were $2.9 million for the three and nine-month periods ended February 28, 2014. See Note 13 - Merger Agreement.
	Stock-based Compensation. We have provided stock-based compensation to employees and non-employee directors in the form of non-qualified and incentive stock options, restricted stock, restricted stock units, stock appreciation rights, deferred compensation agreements and stock awards. The Company began issuing restricted stock units subject to service-based only conditions for the first time to employees in the prior fiscal year. In addition, the Company issued restricted stock units subject to market- and service-based conditions for the first time to employees during the nine-month period ended February 28, 2014.
	We use the Black-Scholes option-pricing model to determine the fair value of stock options and stock appreciation rights granted as of the date of grant. Options with graded vesting are valued as single awards and the related compensation cost is recognized using a straight-line attribution method over the shorter of the vesting period or required service period adjusted for estimated forfeitures.
	We use the closing stock price on the date of grant to determine the fair value of restricted stock units subject to service-based only conditions. The restricted stock units subject to service-based only conditions have cliff vesting at the end of a four year term, and we valued them as a single award with the related compensation cost recognized using a straight-line method over the vesting period adjusted for estimated forfeitures.
	We use a Monte Carlo simulation to determine the fair value of restricted stock units subject to market- and service-based conditions. The restricted stock units subject to market- and service-based conditions have cliff vesting at the end of a four year term subject to the achievement of market conditions, and we valued them as a single award with the related compensation cost recognized using a straight-line method over the vesting period adjusted for estimated forfeitures.
	We used the closing stock price on the date of grant to determine the fair value of stock awards and restricted stock awards. Prior to our executing the January 4, 2013 stock appreciation rights agreement and the deferred compensation agreements, we recorded a liability, which was included in other credits, for deferred compensation agreements and stock awards expected to be settled in cash, based on their fair value at the end of each period until such awards are paid. See further discussion in Note 7.
	Earnings Per Share (“EPS”). Income or loss allocated to common shareholders adjusts net income or loss for the participation in earnings of unvested restricted shares outstanding.
	Basic weighted-average number of common shares outstanding during the period includes contingently issuable shares and excludes outstanding unvested restricted shares. Contingently issuable shares outstanding at February 28, 2014 and 2013, relate to deferred compensation agreements in which directors elected to defer their fees. The deferred compensation is denominated in shares of our common stock and issued in accordance with the terms of the agreement subsequent to retirement or separation from us. The shares are considered contingently issuable because the director has an unconditional right to the shares to be issued.
	Diluted weighted-average number of common shares outstanding during the period adjusts basic weighted-average shares for the dilutive effect of stock options, restricted shares, restricted share units and awards.
	Basic and diluted EPS are calculated as follows:
		Three months ended						Nine months ended
		February 28,			February 28,			February 28,			February 28,
	In thousands except per share	2014			2013			2014			2013
	Earnings
	Net loss from continuing operations	$	(21,769	)	$	(8,513	)	$	(38,979	)	$	(26,098	)
	Net income from discontinued operations	$	—		$	2,699		$	—		$	6,504
	Loss allocated to common shareholders	$	(21,769	)	$	(5,814	)	$	(38,979	)	$	(19,594	)
	Shares
	Weighted-average shares outstanding	28,691			28,200			28,631			28,086
	Contingently issuable shares	5			4			5			3
	Unvested restricted shares	—			(14		)	(7		)	(16		)
Basic weighted-average shares	28,696			28,190			28,629			28,073
Diluted weighted-average shares (1)	28,696			28,190			28,629			28,073
Net loss per share from continuing operations
Basic	$	(0.76	)	$	(0.30	)	$	(1.36	)	$	(0.93	)
Diluted	$	(0.76	)	$	(0.30	)	$	(1.36	)	$	(0.93	)
Net income per share from discontinued operations
Basic	$	—		$	0.09		$	—		$	0.23
Diluted	$	—		$	0.09		$	—		$	0.23
Net loss per share
Basic	$	(0.76	)	$	(0.21	)	$	(1.36	)	$	(0.70	)
Diluted	$	(0.76	)	$	(0.21	)	$	(1.36	)	$	(0.70	)
(1)    Shares excluded due to antidilutive effect of stock options, restricted shares and awards	634			583			595			409
Recently Issued Accounting Guidance. In July 2013, the Financial Accounting Standards Board issued new accounting guidance on the presentation of unrecognized tax benefits. This new guidance requires an entity to present an unrecognized tax benefit, or a portion of an unrecognized tax benefit, as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The new guidance becomes effective for us in our first quarter of fiscal 2015 with earlier adoption permitted, and should be applied prospectively with retroactive application permitted. We are currently evaluating the impact of the new guidance, and do not expect it to have a material effect on our consolidated financial statements.

Discontinued_Operations

Discontinued Operations	9 Months Ended
	Feb. 28, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	Discontinued Operations
	On March 22, 2013, our subsidiaries exchanged their expanded shale and clay lightweight aggregates manufacturing business for the ready-mix concrete business of subsidiaries of Trinity Industries, Inc. in east Texas and southwest Arkansas. Pursuant to the agreements, we transferred our expanded shale and clay manufacturing facilities in Streetman, Texas; Boulder, Colorado and Frazier Park, California; and our DiamondPro® product line in exchange for 42 ready-mix concrete plants stretching from Texarkana to Beaumont in east Texas and in southwestern Arkansas, two aggregate distribution facilities in Beaumont and Port Arthur, Texas, and related assets.
	The following table summarizes the revenue, earnings before and net of income tax expense on all discontinued operations for the three- and nine-month periods ended February 28, 2013:
		Three months ended			Nine months ended
			February 28,		February 28,
	In thousands		2013		2013
	Revenue from discontinued operations		$	13,844	$	42,758
	Income from discontinued operations, before taxes		$	4,206	$	10,070
	Income from discontinued operations, net of taxes		$	2,699	$	6,504

Working_Capital

Working Capital	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Working Capital	'
	Working Capital
	Working capital totaled $185.8 million at February 28, 2014 compared to $187.3 million at May 31, 2013. Selected components of working capital are summarized below.
	Receivables-net consist of:
		February 28,		May 31,
	In thousands	2014		2013
	Trade notes and accounts receivable	$	126,207	$	126,070
	Other	604		852
		$	126,811	$	126,922
	Trade notes and accounts receivable are presented net of allowances for doubtful receivables of $3.5 million at February 28, 2014 and $2.3 million at May 31, 2013. Provisions for bad debts charged to expense was $1.4 million and $0.9 million in the nine-month periods ended February 28, 2014 and 2013, respectively. Uncollectible accounts written off totaled $0.1 million and $0.5 million in the nine-month periods ended February 28, 2014 and 2013, respectively.
	Inventories consist of:
		February 28,		May 31,
	In thousands	2014		2013
	Finished products	$	6,489	$	5,267
	Work in process	8,676		8,630
	Raw materials	20,971		20,090
	Total inventories at LIFO cost	36,136		33,987
	Natural aggregate finished products	19,753		21,836
	Raw materials	265		378
	Parts and supplies	51,756		48,853
	Total inventories at average cost	71,774		71,067
	Total inventories	$	107,910	$	105,054
	All inventories are stated at the lower of cost or market. Finished products, work in process and raw material inventories, excluding natural aggregate inventories, are valued using the last-in, first-out (“LIFO”) method. Natural aggregate finished products and raw material inventories and parts and supplies inventories, which includes emission allowance credits, are valued using the average cost method. An actual valuation of inventory under the LIFO method can be made only at the end of each year based on the inventory levels and costs at that time. Accordingly, interim LIFO calculations are based on management’s estimates of expected year-end inventory levels and costs and are subject to the final year-end LIFO inventory valuation. If the average cost method (which approximates current replacement cost) had been used for all of these inventories, inventory values would have been higher by $21.7 million at February 28, 2014 and $20.7 million at May 31, 2013.
	Accrued interest, compensation and other consists of:
		February 28,		May 31,
	In thousands	2014		2013
	Interest	$	2,761	$	17,801
	Compensation and employee benefits	15,503		15,439
	Casualty insurance claims	16,717		15,890
	Income taxes	2,359		4,666
	Property taxes and other	5,897		8,540
		$	43,237	$	62,336

LongTerm_Debt

Long-Term Debt	9 Months Ended
	Feb. 28, 2014
Long-Term Debt	'
	Long-Term Debt
	Long-term debt consists of:
		February 28,		May 31,
	In thousands	2014		2013
	9.25% Senior notes due 2020 issued August 10, 2010 at par value	$	650,000	$	650,000
	Other	6,594		7,505
		656,594		657,505
	Capital lease obligations	1,994		2,057
	Other contractual obligations	245		245
		658,833		659,807
	Less current portion	2,036		1,872
		$	656,797	$	657,935
	Senior Secured Revolving Credit Facility. On August 25, 2011, we amended and restated our credit agreement and the associated security agreement. The credit agreement continues to provide for a $200 million senior secured revolving credit facility with a $50 million sub-limit for letters of credit and a $15 million sub-limit for swing line loans. The credit facility matures on August 25, 2016. Amounts drawn under the credit facility bear annual interest either at the LIBOR rate plus a margin of 2.00% to 2.75% or at a base rate plus a margin of 1.0% to 1.75%. The base rate is the higher of the federal funds rate plus 0.5%, the prime rate established by Bank of America, N.A. or the one-month LIBOR rate plus 1.0%. The interest rate margins are determined based on the Company’s fixed charge coverage ratio. The commitment fee calculated on the unused portion of the credit facility ranges from 0.375% to 0.50% per year based on the Company’s average daily loan balance. We may terminate the credit facility at any time.
	The amount that can be borrowed under the credit facility is limited to an amount called the borrowing base. The borrowing base may be less than the $200 million stated principal amount of the credit facility. The borrowing base is calculated based on the value of our accounts receivable, inventory and mobile equipment in which the lenders have a security interest. In addition, by mortgaging tracts of its real property to the lenders, the Company may increase the borrowing base by an amount beginning at $20 million and declining to $10.7 million at the maturity of the credit facility.
	The borrowing base under the agreement was $140.7 million as of February 28, 2014. We are not required to maintain any financial ratios or covenants unless an event of default occurs or the unused portion of the borrowing base is less than $25.0 million, in which case we must maintain a fixed charge coverage ratio of at least 1.0 to 1.0. At February 28, 2014, our fixed charge coverage ratio was .92 to 1.0. Given this ratio, we may use only $115.7 million of the borrowing base as of such date. No borrowings were outstanding at February 28, 2014; however, $31.2 million of the borrowing base was used to support letters of credit. As a result, the maximum amount we could borrow as of February 28, 2014 was $84.5 million.
	All of our consolidated subsidiaries have guaranteed our obligations under the credit facility. The credit facility is secured by first priority security interests in all or most of our existing and future consolidated accounts receivable, inventory, equipment, intellectual property and other personal property, and in all of our equity interests in present and future domestic subsidiaries and 66% of the equity interest in any future foreign subsidiaries, if any.
	The credit agreement contains a number of covenants restricting, among other things, prepayment or redemption of our senior notes, distributions and dividends on and repurchases of our capital stock, acquisitions and investments, indebtedness, liens and affiliate transactions. We are permitted to pay cash dividends on our common stock as long as the credit facility is not in default, the fixed charge coverage ratio is greater than 1.0 to 1.0 and borrowing availability under the borrowing base is more than $40 million. When our fixed charge coverage ratio is less than 1.0 to 1.0, we are permitted to pay cash dividends on our common stock not to exceed $2.5 million in any single instance (which shall not occur more than four times in any calendar year) or $10 million in the aggregate during any calendar year as long as the credit facility is not in default and borrowing availability is more than the greater of $60 million or 30% of the aggregate commitments of all lenders. For this purpose, borrowing availability is equal to the borrowing base less the amount of outstanding borrowings less the amount used to support letters of credit. We were in compliance with all of our loan covenants as of February 28, 2014.
	9.25% Senior Notes. On August 10, 2010, we sold $650 million aggregate principal amount of our 9.25% senior notes due 2020 at an offering price of 100%. The notes were issued under an indenture dated as of August 10, 2010. The net proceeds were used to purchase or redeem all of our outstanding 7.25% senior notes due 2013, with additional proceeds available for general corporate purposes.
	At February 28, 2014, we had $650 million aggregate principal amount of 9.25% senior notes outstanding. Under the indenture, at any time on or prior to August 15, 2015, we may redeem the notes at a redemption price equal to the sum of the principal amount thereof, plus accrued interest and a make-whole premium. On and after August 15, 2015, we may redeem all or a part of the notes at the redemption prices (expressed as percentages of principal amount) set forth below plus accrued and unpaid interest if redeemed during the twelve-month period beginning on August 15 of the years indicated below:
	Year	Percentage
	2015	104.625	%
	2016	103.083	%
	2017	101.542	%
	2018 and thereafter	100	%
	We may be required to offer to purchase the notes at a purchase price equal to 101% of the principal amount, plus accrued interest, if we experience a change of control.
	All of our consolidated subsidiaries have unconditionally guaranteed the 9.25% senior notes. The indenture governing the notes contains affirmative and negative covenants that, among other things, limit our and our subsidiaries’ ability to pay dividends on or redeem or repurchase stock, make certain investments, incur additional debt or sell preferred stock, create liens, restrict dividend payments or other payments from subsidiaries to the Company, engage in consolidations and mergers or sell or transfer assets, engage in sale and leaseback transactions, engage in transactions with affiliates, and sell stock in our subsidiaries. We are not required to maintain any affirmative financial ratios or covenants. We were in compliance with all of our covenants as of February 28, 2014.
	Other. Principal payments due on long-term debt, excluding operating lease and other contract obligations, during each of the five years subsequent to February 28, 2014 are $2.0 million, $2.0 million, $2.0 million, $0.9 million and $0.2 million. The total amount of interest incurred was $17.4 million and $17.4 million in the three-month periods ended February 28, 2014 and 2013, of which $10.2 million was capitalized for the three-month period ended February 28, 2013. The total amount of interest incurred was $52.2 million and $51.9 million in the nine-month periods ended February 28, 2014 and 2013, respectively, of which 29.4 million was capitalized in the nine-month period ended February 28, 2013. The total amount of interest paid in cash was $67.0 million and $66.0 million in the nine-month periods ended February 28, 2014 and 2013, respectively.
	Guarantee of Joint Venture Debt. We have been released from our 50% guarantee of the joint venture’s debt, which was refinanced in November, 2013. The joint venture was in compliance with all the terms of the debt as of February 28, 2014. See further discussion of the joint venture under Investment in Joint Venture in Note 1.

Commitments

Commitments	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Commitments	'
	Commitments
	There have been no significant changes from what was reported in our Annual Report on Form 10-K for the year end May 31, 2013.

Shareholders_Equity

Shareholders' Equity	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Shareholders' Equity	'
	Shareholders’ Equity
	There are authorized 100,000 shares of Cumulative Preferred Stock, no par value, of which 20,000 shares are designated $5 Cumulative Preferred Stock (Voting), redeemable at $105 per share and entitled to $100 per share upon dissolution. An additional 40,000 shares are designated Series B Junior Participating Preferred Stock. The Series B Preferred Stock is not redeemable and ranks, with respect to the payment of dividends and the distribution of assets, junior to (i) all other series of the Preferred Stock unless the terms of any other series shall provide otherwise and (ii) the $5 Cumulative Preferred Stock. No shares of $5 Cumulative Preferred Stock or Series B Junior Participating Preferred Stock were outstanding as of February 28, 2014.

StockBased_Compensation_Plans

Stock-Based Compensation Plans	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Stock-Based Compensation Plans	'
	Stock-Based Compensation Plans
	The Texas Industries, Inc. 2004 Omnibus Equity Compensation Plan (the “2004 Plan”) provides that, in addition to other types of awards, non-qualified and incentive stock options to purchase Common Stock may be granted to employees and non-employee directors at market prices at date of grant. This plan also provides for the granting of restricted stock units ("RSUs").
	Options become exercisable in installments beginning one year after the date of grant and expire 10 years after the date of grant. The fair value of each option grant was estimated on the date of grant using the Black-Scholes option pricing model. Options with graded vesting are valued as single awards and the compensation cost recognized using a straight-line attribution method over the shorter of the vesting period or required service period adjusted for estimated forfeitures. No options were granted during the nine-month period ended February 28, 2014.
	Expected volatility is based on an analysis of historical volatility of our common stock. Expected option term is the period of time that options granted are expected to be outstanding and is derived by analyzing the historical option exercise experience of our optionees. Risk-free interest rate is determined using the implied yield currently available for zero coupon U.S. treasury issues with a remaining term equal to the expected term of the option. Expected dividend yield is based on the approved annual dividend rate in effect and the market price of our common stock at the time of grant.
	A summary of option transactions for the nine-month period ended February 28, 2014, follows:
		Shares Under		Weighted-Average
		Option		Option Price
	Outstanding at May 31, 2013	1,508,533		$	40.68
	Exercised	(216,825	)	$	41.79
	Canceled	(28,383	)	$	62.86
	Outstanding at February 28, 2014	1,263,325		$	39.99
	Exercisable at February 28, 2014	880,365		$	42.62
	The following table summarizes information about stock options outstanding as of February 28, 2014.
		Range of Exercise Prices
		$16.04 - $29.38			$33.57 - $48.60		$50.63 - $70.18
	Options outstanding
	Shares outstanding	432,764			530,561		300,000
	Weighted-average remaining life in years	6.88			5.38		2.83
	Weighted-average exercise price	$	27.83		$	39.73	$	57.98
	Options exercisable
	Shares exercisable	232,604			347,761		300,000
	Weighted-average remaining life in years	6.03			4.74		2.83
	Weighted-average exercise price	$	26.51		$	40.16	$	57.96
	Outstanding options expire on various dates up to January 11, 2022. As of February 28, 2014, there were 2,697,646 shares available for future awards under the 2004 Plan.
	As of February 28, 2014, the aggregate intrinsic value (the difference in the closing market price of our common stock of $84.90 and the exercise price to be paid by the optionee) of stock options outstanding was $56.7 million. The aggregate intrinsic value of exercisable stock options at that date was $37.2 million. The total intrinsic value for options exercised (the difference in the market price of our common stock on the exercise date and the price paid by the optionee to exercise the option) was $5.8 million and $5.3 million for the three-month periods ended February 28, 2014 and 2013, respectively and $6.6 million and $6.3 million for the nine-month periods ended February 28, 2014 and 2013, respectively.
	We began issuing RSUs subject to service-based only conditions to employees in fiscal 2013. In the nine-month period ended February 28, 2014, we began issuing RSUs subject to market- and service-based conditions to employees. All RSUs vest at the end of a four year term subject to achievement of market conditions for those RSUs with market conditions. We determine the fair value of RSUs subject to service-based only conditions using the closing stock price on the date of grant, and value them as a single award with the related compensation cost recognized using a straight-line method over the vesting period, adjusted for estimated forfeitures. We determine the fair value of RSUs subject to market- and service-based conditions using a Monte Carlo simulation, and value them as a single award with the related compensation cost recognized using a straight-line method over the vesting period, adjusted for estimated forfeitures. Employees received 85,219 RSUs during the nine-month period ended February 28, 2014 with a closing stock price on the date of grant of $70.68, of which 54,512 are market-based awards and the remaining are service-based awards.
	We have provided additional stock-based compensation to employees and directors under stock appreciation rights contracts, deferred compensation agreements, restricted stock payments. At February 28, 2014, outstanding stock appreciation rights totaled 133,315 shares and deferred compensation agreements to be settled in common stock totaled 5,495 shares.
	Common stock totaling 4.0 million shares at February 28, 2014 have been reserved for the settlement of stock-based compensation.
	Total stock-based compensation included in selling, general and administrative expense was $1.4 million and $2.7 million in the three-month periods ended February 28, 2014 and 2013. Total stock-based compensation included in selling, general and administrative expense was $5.4 million, which included $1.0 million in stock grants to the Company's Directors in the nine-month period ended February 28, 2014 and $7.0 million in the nine-month period ended February 28, 2013.
	Prior to our executing the January 4, 2013 stock appreciation rights agreement and the deferred compensation agreements, the impact of changes in our company's stock price on stock-based awards previously accounted for as liabilities increased stock-based compensation $1.0 million in the three-month period ended February 28, 2013 and $1.7 million in the nine-month period ended February 28, 2013.
	No tax expense or benefit was recognized for stock-based compensation in our statement of operations in the nine-month period ended February 28, 2014, and less than $0.1 million was recognized in the nine-month period ended February 28, 2013.
	As of February 28, 2014, the total unrecognized stock-based compensation expense was $12.6 million. Stock-based compensation expense expected to be recognized in the twelve-month periods ending February 28, 2015 is $4.9 million, $4.1 million in 2016, $3.1 million in 2017 and $0.5 million in 2018.

Retirement_Plans

Retirement Plans	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Retirement Plans	'
	Retirement Plans
	Riverside Defined Benefit Plans. Approximately 600 employees and retirees of our subsidiary, Riverside Cement Company, are covered by a defined benefit pension plan and a postretirement health benefit plan. Unrecognized prior service costs and actuarial gains or losses for these plans are recognized in a systematic manner over the remaining service periods of active employees expected to receive benefits under these plans. The expenses associated with the defined benefit pension plan and postretirement health benefit plan are included in the computation of total employee benefit cost which is allocated to costs of products sold and to selling, general, and administrative in the consolidated statement of operations. The expense (benefits) associated with these plans for the three-month and nine-month periods ended February 28, 2014 and 2013, was as follows:
		Three months ended						Nine months ended
		February 28,			February 28,			February 28,			February 28,
	In thousands	2014			2013			2014			2013
	Defined benefit pension plan
	Service cost	$	—		$	61		$	—		$	277
	Interest cost	683			635			2,049			1,978
	Expected return on plan assets	(851		)	(770		)	(2,553		)	(2,288		)
	Amortization of net actuarial loss	153			217			461			1,165
		$	(15	)	$	143		$	(43	)	$	1,132
	Postretirement health benefit plan
	Service cost	$	25		$	27		$	75		$	81
	Interest cost	72			88			216			264
	Amortization of prior service cost	(193		)	(195		)	(581		)	(581		)
	Amortization of net actuarial loss	59			129			172			387
		$	(37	)	$	49		$	(118	)	$	151
	The Riverside postretirement health benefit plan ("Benefit Plan") was amended effective January 1, 2014.  This amendment discontinued medical coverage for all retirees and the subsidy for Medicare eligible retirees.  The Benefit Plan continues to provide a subsidy to retirees not eligible for Medicare.
	The Riverside defined benefit pension plan (“Pension Plan”) was amended during the first quarter of fiscal year 2013. This amendment provided for the cessation of all benefit accruals under the Pension Plan effective December 31, 2012 and the Pension Plan was frozen as of that date. The amendment was designed to reduce future pension costs and provides that, effective December 31, 2012, all future benefit accruals under the Pension Plan will automatically cease for all participants, and the accrued benefits under the Pension Plan will be determined and frozen as of that date.
	Financial Security Defined Benefit Plans. Substantially all of our executive and certain managerial employees are covered by a series of financial security plans that are non-qualified defined benefit plans. The financial security plans require deferral of a portion of a participant’s salary and provide retirement, death and disability benefits to participants. The financial security plans are unfunded and benefits are paid as they become due. Actuarial gains or losses are recognized when incurred. The expenses associated with the financial security plan are included in the computation of total employee benefit cost which is allocated to costs of products sold and to selling, general, and administrative in the consolidated statement of operations. The costs of this plan for the three-month and nine-month periods ended February 28, 2014 and 2013, was as follows:
		Three months ended						Nine months ended
		February 28,			February 28,			February 28,			February 28,
	In thousands	2014			2013			2014			2013
	Service cost	$	536		$	593		$	1,608		$	1,778
	Interest cost	609			591			1,827			1,773
		$	1,145		$	1,184		$	3,435		$	3,551
	The financial security defined benefit plans were amended during the second quarter of fiscal year 2013. This amendment provided that effective December 31, 2012 the plans were frozen.

Income_Taxes

Income Taxes	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Income Taxes	'
	Income Taxes
	Income taxes for the interim periods ended February 28, 2014 and 2013 have been included in the accompanying financial statements on the basis of an estimated annual rate. The tax rate differs from the 35% federal statutory corporate rate primarily due to percentage depletion that is tax deductible, state income taxes and valuation allowances against deferred tax assets. The estimated annualized rate is 5.4% for fiscal year 2014 compared to 7.9% for fiscal year 2013. We received income tax refunds of $0.4 million in the nine-month period ended February 28, 2014 and none in the nine-month period ended February 28, 2013. We made no income tax payments in the nine-month periods ended February 28, 2014 and 2013.
	Net deferred tax assets totaled $5.0 million at February 28, 2014 and $6.7 million at May 31, 2013. Net deferred tax assets classified as current were $14.2 million at February 28, 2014 and $18.8 million at May 31, 2013. Management reviews our deferred tax position and in particular our deferred tax assets whenever circumstances indicate that the assets may not be realized in the future and records a valuation allowance unless such deferred tax assets are deemed more likely than not to be recoverable. The ultimate realization of these deferred tax assets depends upon various factors including the generation of taxable income during future periods. The Company’s deferred tax assets exceeded deferred tax liabilities as of February 28, 2014 and May 31, 2013 primarily as a result of recent losses. Management has concluded that the sources of taxable income we are permitted to consider do not assure the realization of the entire amount of our net deferred tax assets. Accordingly, a valuation allowance is required due to the uncertainty of realizing the deferred tax assets. We will continue to record additional valuation allowance against additions to our net deferred tax assets for fiscal year 2014 until management believes it is more likely than not the deferred tax assets will be realized.
	The amount of income tax we pay is subject to ongoing audits by federal and state authorities which may result in proposed assessments. We adjust reserves for our uncertain tax positions due to changing facts and circumstances, such as the closing of a tax audit, judicial rulings, refinement of estimates, or realization of earnings or deductions that differ from our estimates. To the extent that the final outcome of a matter differs from the amount recorded, such difference generally will impact our provision for income taxes in the period that includes its final resolution. Reserves for uncertain tax positions including related interest and penalties were not material at February 28, 2014 or May 31, 2013.
	In addition to our federal income tax return, we file income tax returns in various state jurisdictions. We are no longer subject to income tax examinations by federal and state tax authorities for years prior to 2009. The Internal Revenue Service completed their review in fiscal year 2013 of our federal income tax returns for 2007 through 2010 resulting in no adjustments.

Legal_Proceedings_and_Continge

Legal Proceedings and Contingent Liabilities	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Legal Proceedings and Contingent Liabilities	'
	Legal Proceedings and Contingent Liabilities
	In February 2014, following the announcement of the proposed merger between the Company and Martin Marietta Materials, Inc. (“Martin Marietta”), a purported stockholder of the Company filed a putative class action lawsuit against the Company and members of its board, and against Martin Marietta and one of its affiliates, in the United States District Court for the Northern District of Texas, captioned Maxine Phillips, Individually and on Behalf of all Others Similarly Situated v. Texas Industries, Inc., et al., Case 3:14-cv-00740-B.  The plaintiff alleges in an amended complaint, among other things, (i) that members of the Company’s board breached their fiduciary duties to  stockholders by failing to fully disclose material information regarding the proposed transaction and by adopting the merger agreement for inadequate consideration and pursuant to an inadequate process, (ii) that Martin Marietta and one of its affiliates aided and abetted the Company’s board in their alleged breaches of fiduciary duty, and (iii) that the registration statement filed with the Securities and Exchange Commission in connection with the merger contains certain material misstatements and omissions in violation of Sections 14(a) and 20(a) of the Securities Exchange Act of 1934.  The plaintiff seeks, among other things, injunctive relief enjoining the Company and Martin Marietta from proceeding with the merger, rescission in the event that the merger is consummated, damages and an award of attorneys’ fees and other fees and costs.  The Company believes that the claims are without merit.
	We are subject to federal, state and local environmental laws, regulations and permits concerning, among other matters, air emissions and wastewater discharge. We intend to comply with these laws, regulations and permits. However, from time to time we receive claims from federal and state environmental regulatory agencies and entities asserting that we are or may be in violation of certain of these laws, regulations and permits, or from private parties alleging that our operations have injured them or their property. It is possible that we could be held liable for future charges which might be material but are not currently known or estimable. In addition, changes in federal or state laws, regulations or requirements or discovery of currently unknown conditions could require additional expenditures by us.
	In March 2008, the South Coast Air Quality Management District, or SCAQMD, informed one of our subsidiaries, Riverside Cement Company (Riverside), that it believed that operations at the Crestmore cement plant in Riverside, California caused the level of hexavalent chromium, or chrome 6, in the air in the vicinity of the plant to be elevated above ambient air levels. Chrome 6 has been identified by the State of California as a carcinogen. Riverside immediately began taking steps, in addition to its normal dust control procedures, to reduce dust from plant operations and eliminate the use of open clinker stockpiles. In February 2008, the SCAQMD placed an air monitoring station at the downwind property line closest to the open clinker stockpiles. In the SCAQMD’s first public report of the results of its monitoring, over the period of February 12 to April 9, 2008, the average level of chrome 6 was 2.43 nanograms per cubic meter, or ng/m³. Since that time, the average level has decreased. The average levels of chrome 6 reported by the SCAQMD at all of the air monitoring stations in areas around the plant, including the station at the property line, are below 1.0 ng/m³ over the entire period of time it has operated the stations. The SCAQMD compared the level of exposure at the air monitor on our property line with the following employee exposure standards established by regulatory agencies:
	Occupational Safety and Health Administration	5,000 ng/m³
	National Institute for Occupational Safety and Health	1,000 ng/m³
	California Environmental Protection Agency	200 ng/m³
	In public meetings conducted by the SCAQMD, it stated that the risk of long term exposure immediately adjacent to the plant is similar to living close to a busy freeway or rail yard, and it estimated an increased risk of 250 to 500 cancers per one million people, assuming continuous exposure for 70 years. Riverside has not determined how this particular risk number was calculated by SCAQMD. However, the Riverside Press Enterprise reported in a May 30, 2008 story that “John Morgan, a public health and epidemiology professor at Loma Linda University, said he looked at cancer cases reported from 1996 to 2005 in the census tract nearest the plant and found no excess cases. That includes lung cancer, which is associated with exposure to hexavalent chromium.”
	In late April 2008, a lawsuit was filed in Riverside County Superior Court of the State of California styled Virginia Shellman, et al. v. Riverside Cement Holdings Company, et al . The lawsuit against three of our subsidiaries purports to be a class action complaint for medical monitoring for a putative class defined as individuals who were allegedly exposed to chrome 6 emissions from our Crestmore cement plant. The complaint alleges an increased risk of future illness due to the exposure to chrome 6 and other toxic chemicals. The suit requests, among other things, establishment and funding of a medical testing and monitoring program for the class until their exposure to chrome 6 is no longer a threat to their health, as well as punitive and exemplary damages.
	Since the Shellman lawsuit was filed, five additional putative class action lawsuits have been filed in the same court. The putative class in each of these cases is the same as or a subset of the putative class in the Shellman case, and the allegations and requests for relief are similar to those in the Shellman case. As a consequence, the court has stayed four of these lawsuits until the Shellman lawsuit is finally determined.
	Since August 2008, additional lawsuits have been filed in the same court against Texas Industries, Inc. or one or more of our subsidiaries containing allegations of personal injury and wrongful death by approximately 3,000 individual plaintiffs who were allegedly exposed to chrome 6 and other toxic or harmful substances in the air, water and soil caused by emissions from the Crestmore plant. The court has dismissed Texas Industries, Inc. from the suits, and our subsidiaries operating in Texas have been dismissed by agreement with the plaintiffs. Most of our subsidiaries operating in California remain as defendants. The court has dismissed from these suits plaintiffs that failed to provide required information, leaving approximately 2,000 plaintiffs.
	Since January 2009, additional lawsuits have been filed against Texas Industries, Inc. or one or more of our subsidiaries in the same court involving similar allegations, causes of action and requests for relief, but with respect to our Oro Grande, California cement plant instead of the Crestmore plant. The suits involve approximately 300 individual plaintiffs. Texas Industries, Inc. and our subsidiaries operating in Texas have been similarly dismissed from these suits. The court has dismissed from these suits plaintiffs that failed to provide required information, leaving approximately 250 plaintiffs. Prior to the filing of the lawsuits, the air quality management district in whose jurisdiction the plant lies conducted air sampling from locations around the plant. None of the samples contained chrome 6 levels above 1.0 ng/m³.
	The plaintiffs allege causes of action that are similar from suit to suit. Following dismissal of certain causes of action by the court and amendments by the plaintiffs, the remaining causes of action typically include, among other things, negligence, intentional and negligent infliction of emotional distress, trespass, public and private nuisance, strict liability, willful misconduct, fraudulent concealment, unfair business practices, wrongful death and loss of consortium. The plaintiffs generally request, among other things, general and punitive damages, medical expenses, loss of earnings, property damages and medical monitoring costs. At the date of this report, none of the plaintiffs in these cases has alleged in their pleadings any specific amount or range of damages. Some of the suits include additional defendants, such as the owner of another cement plant located approximately four miles from the Crestmore plant or former owners of the Crestmore and Oro Grande plants. Discovery is proceeding in all of the suits, and the trial for the claims of 14 of the individual plaintiffs is currently scheduled to begin in January, 2015. No trial date has been set in the class action suits or for other individual plantiffs. We are vigorously defending all of these suits but we cannot predict what liability, if any, could arise from them. We also cannot predict whether any other suits may be filed against us alleging damages due to injuries to persons or property caused by claimed exposure to chrome 6.
	We are defendants in other lawsuits that arose in the ordinary course of business. In our judgment the ultimate liability, if any, from such legal proceedings will not have a material effect on our consolidated financial position or results of operations.

Business_Segments

Business Segments	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Business Segments	'
	Business Segments
	We have three business segments: cement, aggregates and concrete. Our business segments are managed separately along product lines. Through the cement segment we produce and sell gray portland cement as our principal product, as well as specialty cements. Through the aggregates segment we produce and sell stone, sand and gravel as our principal products. Previously, the aggregates segment included our expanded shale and clay lightweight aggregates which has been classified as discontinued operations in the prior period. Through the concrete segment we produce and sell ready-mix concrete as our principal product. We account for intersegment sales at market prices. Segment operating profit consists of net sales less operating costs and expenses. Corporate includes those administrative, financial, legal, human resources, environmental and real estate activities which are not allocated to operations and are excluded from segment operating profit. Identifiable assets by segment are those assets that are used in each segment’s operation. Corporate assets consist primarily of cash and cash equivalents, real estate and other financial assets not identified with a business segment. The following is a summary of operating results and certain other financial data for our business segments relating to continuing operations, and does not include information pertaining to discontinued operations.
		Three months ended						Nine months ended
		February 28,			February 28,			February 28,			February 28,
	In thousands	2014			2013			2014			2013
	Net sales
	Cement
	Sales to external customers	$	83,095		$	71,288		$	265,675		$	239,406
	Intersegment sales	17,642			9,277			52,173			29,807
	Aggregates
	Sales to external customers	31,094			25,439			98,857			94,738
	Intersegment sales	10,806			5,378			34,761			17,272
	Concrete
	Sales to external customers	93,639			44,632			285,270			149,431
	Intersegment sales	22			8			82			119
	Eliminations	(28,470		)	(14,663		)	(87,016		)	(47,198		)
	Total net sales	$	207,828		$	141,359		$	649,802		$	483,575
	Segment operating profit (loss)
	Cement	$	(1,614	)	$	9,849		$	16,073		$	24,328
	Aggregates	3,386			2,111			15,363			9,629
	Concrete	4,850			(4,262		)	9,464			(8,777		)
	Total segment operating profit	6,622			7,698			40,900			25,180
	Corporate	(11,197		)	(10,339		)	(27,596		)	(30,967		)
	Merger charges	(2,863		)	—			(2,863		)	—
	Interest	(17,409		)	(7,227		)	(52,203		)	(22,462		)
	Loss before income taxes	$	(24,847	)	$	(9,868	)	$	(41,762	)	$	(28,249	)
	Depreciation, depletion and amortization
	Cement	$	13,017		$	8,395		$	39,137		$	25,288
	Aggregates	2,601			3,166			8,674			9,840
	Concrete	3,160			2,281			9,965			6,128
	Corporate	316			254			780			700
	Total depreciation, depletion and amortization	$	19,094		$	14,096		$	58,556		$	41,956
	Capital expenditures
	Cement	$	5,713		$	13,803		$	22,128		$	54,588
	Aggregates	963			927			3,644			3,528
	Concrete	346			7,290			3,147			9,536
	Corporate	1,835			201			4,358			1,220
	Total capital expenditures	$	8,857		$	22,221		$	33,277		$	68,872
	Net sales by product
	Cement	$	75,713		$	63,811		$	240,466		$	213,215
	Aggregates	20,325			16,641			64,009			60,638
	Concrete	92,723			44,821			284,355			149,403
	Other products	3,123			2,025			8,740			7,540
	Delivery fees	15,944			14,061			52,232			52,779
	Total net sales	$	207,828		$	141,359		$	649,802		$	483,575
	All sales were made in the United States during the periods presented with no single customer representing more than ten percent of sales.
	Capital expenditures for normal replacement and upgrades of existing equipment and acquisitions to sustain existing operations were $26.2 million and $17.8 million in the nine-month periods ended February 28, 2014 and 2013, respectively.
	Capital expenditures in connection with the expansion of our Hunter, Texas cement plant for the nine-month period ended February 28, 2014 were $7.1 million consisting solely of interest paid that was capitalized in the prior year period ended May 31, 2013. Capital expenditures incurred in connection with the expansion of our Hunter, Texas cement plant were $61.3 million in the nine-month period ended February 28, 2013, of which $38.5 million was capitalized interest paid.
	The following is a summary of assets used in each of our business segments.
	In thousands	February 28,			May 31,
		2014			2013
	Identifiable assets
	Cement	$	1,147,172		$	1,174,879
	Aggregates	159,580			168,255
	Concrete	187,901			182,839
	Corporate	92,377			109,852
	Total assets	$	1,587,030		$	1,635,825
	All of our identifiable assets are located in the United States.

Condensed_Consolidating_Financ

Condensed Consolidating Financial Information	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Condensed Consolidating Financial Information	'
	Condensed Consolidating Financial Information
	On August 10, 2010, Texas Industries, Inc. (the parent company) issued $650 million aggregate principal amount of its 9.25% senior notes due 2020. All existing consolidated subsidiaries of the parent company are 100% owned and provide a joint and several, full and unconditional guarantee of the securities. There are no significant restrictions on the parent company’s ability to obtain funds from any of the guarantor subsidiaries in the form of a dividend or loan. Additionally, there are no significant restrictions on a guarantor subsidiary’s ability to obtain funds from the parent company or its direct or indirect subsidiaries.
	The following condensed consolidating balance sheets, statements of operations and comprehensive income (loss) and statements of cash flows are provided for the parent company and guarantor subsidiaries. The information has been presented as if the parent company accounted for its ownership of the guarantor subsidiaries using the equity method of accounting. Prior period information has been reclassified to conform to the current period presentation.
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating balance sheet at February 28, 2014
	Cash and cash equivalents	$	45,957		$	1,876		$	—		$	47,833
	Receivables – net	563			126,811			(563		)	126,811
	Inventories	—			107,910			—			107,910
	Deferred income taxes and prepaid expenses	927			19,285			(155		)	20,057
	Total current assets	47,447			255,882			(718		)	302,611
	Property, plant and equipment – net	—			1,192,855			—			1,192,855
	Goodwill	—			40,072			—			40,072
	Real estate and investments	1,624			30,156			—			31,780
	Deferred income taxes and other charges	208,438			10,015			(198,741		)	19,712
	Investment in subsidiaries	1,081,716			—			(1,081,716		)	—
	Long-term intercompany receivables	122,508			18,725			(141,233		)	—
	Total assets	$	1,461,733		$	1,547,705		$	(1,422,408	)	$	1,587,030
	Accounts payable	$	—		$	72,147		$	(563	)	$	71,584
	Accrued interest, compensation and other	8,526			34,866			(155		)	43,237
	Current portion of long-term debt	—			2,036			—			2,036
	Total current liabilities	8,526			109,049			(718		)	116,857
	Long-term debt	650,245			6,552			—			656,797
	Long-term intercompany payables	18,737			122,496			(141,233		)	—
	Deferred income taxes and other credits	52,137			227,892			(198,741		)	81,288
	Shareholders’ equity	732,088			1,081,716			(1,081,716		)	732,088
	Total liabilities and shareholders’ equity	$	1,461,733		$	1,547,705		$	(1,422,408	)	$	1,587,030
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating balance sheet at May 31, 2013
	Cash and cash equivalents	$	58,791		$	2,505		$	—		$	61,296
	Receivables – net	—			126,922			—			126,922
	Inventories	—			105,054			—			105,054
	Deferred income taxes and prepaid expenses	615			26,834			(155		)	27,294
	Total current assets	59,406			261,315			(155		)	320,566
	Property, plant and equipment – net	—			1,226,396			—			1,226,396
	Goodwill	—			40,575			—			40,575
	Real estate and investments	1,080			28,391			—			29,471
	Deferred income taxes and other charges	210,838			7,744			(199,765		)	18,817
	Investment in subsidiaries	1,061,854			—			(1,061,854		)	—
	Long-term intercompany receivables	167,778			18,743			(186,521		)	—
	Total assets	$	1,500,956		$	1,583,164		$	(1,448,295	)	$	1,635,825
	Accounts payable	$	46		$	69,015		$	—		$	69,061
	Accrued interest, compensation and other	26,416			36,075			(155		)	62,336
	Current portion of long-term debt	—			1,872			—			1,872
	Total current liabilities	26,462			106,962			(155		)	133,269
	Long-term debt	650,245			7,690			—			657,935
	Long-term intercompany payables	18,743			167,778			(186,521		)	—
	Deferred income taxes and other credits	52,042			238,880			(199,765		)	91,157
	Shareholders’ equity	753,464			1,061,854			(1,061,854		)	753,464
	Total liabilities and shareholders’ equity	$	1,500,956		$	1,583,164		$	(1,448,295	)	$	1,635,825
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating statement of operations and comprehensive income (loss) for the three months ended February 28, 2013
	Net sales	$	—		$	141,359		$	—		$	141,359
	Cost of products sold	—			129,035			—			129,035
	Gross profit	—			12,324			—			12,324
	Selling, general and administrative	2,762			14,294			—			17,056
	Interest	17,309			—			(10,082		)	7,227
	Other income, net	(13		)	(2,078		)	—			(2,091		)
	Intercompany other (income) loss	(863		)	(9,219		)	10,082			—
	Income (loss) from continuing operations before the following items	(19,195		)	9,327			—			(9,868		)
	Income taxes (benefit)	517			(1,872		)	—			(1,355		)
Equity in earnings of subsidiaries	13,898			—			(13,898		)	—
Net income (loss) from continuing operations	(5,814		)	11,199			(13,898		)	(8,513		)
Net income from discontinued operations	—			2,699			—			2,699
Net income (loss)	$	(5,814	)	$	13,898		$	(13,898	)	$	(5,814	)
Comprehensive income (loss)	$	(5,814	)	$	13,994		$	(13,898	)	$	(5,718	)
In thousands	Texas			Guarantor			Consolidating			Consolidated
	Industries, Inc.			Subsidiaries			Adjustments
Condensed consolidating statement of operations and comprehensive income (loss) for the nine months ended February 28, 2014
Net sales	$	—		$	649,802		$	—		$	649,802
Cost of products sold	—			592,986			—			592,986
Gross profit	—			56,816			—			56,816
Selling, general and administrative	8,643			47,828			—			56,471
Merger charges	2,863			—			—			2,863
Interest	51,877			—			326			52,203
Other income, net	(70		)	(12,889		)	—			(12,959		)
Intercompany other (income) loss	(2,618		)	2,944			(326		)	—
Income (loss) from continuing operations before the following items	(60,695		)	18,933			—			(41,762		)
Income taxes (benefit)	(2,169		)	(614		)	—			(2,783		)
Equity in earnings of subsidiaries	19,547			—			(19,547		)	—
Net income (loss) from continuing operations	$	(38,979	)	$	19,547		$	(19,547	)	$	(38,979	)
Net income from discontinued operations	$	—		$	—		$	—		$	—
Net income (loss)	$	(38,979	)	$	19,547		$	(19,547	)	$	(38,979	)
Comprehensive income (loss)	$	(38,979	)	$	22,724		$	(19,547	)	$	(35,802	)
In thousands	Texas			Guarantor			Consolidating			Consolidated
	Industries, Inc.			Subsidiaries			Adjustments
Condensed consolidating statement of operations and comprehensive income (loss) for the nine months ended February 28, 2013
Net sales	$	—		$	483,575		$	—		$	483,575
Cost of products sold	—			444,297			—			444,297
Gross profit	—			39,278			—			39,278
Selling, general and administrative	7,446			44,233			—			51,679
Interest	51,545			—			(29,083		)	22,462
Other income, net	(62		)	(6,552		)	—			(6,614		)
Intercompany other (income) loss	(2,618		)	(26,465		)	29,083			—
Income (loss) from continuing operations before the following items	(56,311		)	28,062			—			(28,249		)
Income taxes (benefit)	441			(2,592		)	—			(2,151		)
Equity in earnings of subsidiaries	37,159			—			(37,159		)	—
Net income (loss) from continuing operations	(19,593		)	30,654			(37,159		)	(26,098		)
Net income from discontinued operations	—			6,504			—			6,504
Net income (loss)	$	(19,593	)	$	37,158		$	(37,159	)	$	(19,594	)
Comprehensive Income (loss)	$	(19,593	)	$	37,719		$	(37,159	)	$	(19,033	)
In thousands	Texas			Guarantor			Consolidating			Consolidated
	Industries, Inc.			Subsidiaries			Adjustments
Condensed consolidating statement of cash flows for the nine months ended February 28, 2014 (unaudited)
Net cash provided (used) by operating activities	$	(71,557	)	$	70,892		$	—		$	(665	)
Investing activities
Capital expenditures – expansions	—			(7,125		)	—			(7,125		)
Capital expenditures – other	—			(26,152		)	—			(26,152		)
Proceeds from asset disposals	—			8,390			—			8,390
Proceeds from insurance contracts, net of premiums paid	4,386			—			—			4,386
Net cash provided (used) by investing activities	4,386			(24,887		)	—			(20,501		)
Financing activities
Debt payments	—			(1,373		)	—			(1,373		)
Stock option exercises	9,076			—			—			9,076
Net intercompany financing activities	45,261			(45,261		)	—			—
Net cash provided (used) by financing activities	54,337			(46,634		)	—			7,703
Decrease in cash and cash equivalents	(12,834		)	(629		)	—			(13,463		)
Cash and cash equivalents at beginning of period	58,791			2,505			—			61,296
Cash and cash equivalents at end of period	$	45,957		$	1,876		$	—		$	47,833
In thousands	Texas			Guarantor			Consolidating			Consolidated
	Industries, Inc.			Subsidiaries			Adjustments
Condensed consolidating statement of cash flows for the nine months ended February 28, 2013 (unaudited)
Net cash provided (used) by operating activities	$	(88,158	)	$	97,929		$	—		$	9,771
Investing activities
Capital expenditures – expansions	—			(61,344		)	—			(61,344		)
Capital expenditures – other	—			(17,752		)	—			(17,752		)
Proceeds from asset disposals	—			5,783			—			5,783
Proceeds from insurance contracts, net of premiums paid	2,366			—			—			2,366
Other – net	—			(67		)	—			(67		)
Net cash provided (used) by investing activities	2,366			(73,380		)	—			(71,014		)
Financing activities
Debt payments	(4		)	(2,232		)	—			(2,236		)
Stock option exercises	7,116			—			—			7,116
Net intercompany financing activities	20,382			(20,382		)	—			—
Net cash provided (used) by financing activities	27,494			(22,614		)	—			4,880
Increase (decrease) in cash and cash equivalents	(58,298		)	1,935			—			(56,363		)
Cash and cash equivalents at beginning of period	84,713			3,314			—			88,027
Cash and cash equivalents at end of period	$	26,415		$	5,249		$	—		$	31,664

Merger_Agreement_Merger_Agreem

Merger Agreement Merger Agreement	9 Months Ended
	Feb. 28, 2014
Business Combinations [Abstract]	'
Merger Agreement	'
	Merger Agreement
	On January 27, 2014, the Company entered into an Agreement and Plan of Merger (the “merger agreement”) with Martin Marietta Materials, Inc. ("Martin Marietta") and Project Holdings, Inc. ("Merger Sub"), a wholly owned subsidiary of Martin Marietta. Subject to the terms and conditions set forth in the merger agreement, Merger Sub will merge with and into the Company with the Company surviving the merger as a wholly owned subsidiary of Martin Marietta. At the effective time of the merger, each outstanding share of Company common stock will be exchanged for 0.70 of a share of Martin Marietta common stock. The merger agreement was unanimously approved by the Boards of Directors of the Company and Martin Marietta.
	The consummation of the merger is subject to customary closing conditions, including, among others, the adoption of the merger agreement by the Company's stockholders, approval by the Martin Marietta shareholders of the issuance of the Martin Marietta common stock in connection with the merger and expiration or termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended. In addition, the merger agreement contains certain termination rights for both the Company and Martin Marietta, and further provides for the payment of termination fees under certain specified circumstances. The Company currently anticipates the closing of the proposed business combination with Martin Marietta to be in the summer of 2014. However, the Company cannot assure that the closing of the proposed business combination will occur by any particular date, or at all.
	In connection with the proposed business combination with Martin Marietta, Martin Marietta has filed with the Securities and Exchange Commission ("SEC") a Registration Statement on Form S-4 that included a joint proxy statement of the Company and Martin Marietta and also constituted a prospectus for the shares of Martin Marietta common stock to be issued upon consummation of the merger. For additional information regarding the proposed business combination and the risks and uncertainties associated with it, please see the joint proxy statement/prospectus included in the Registration Statement on Form S-4 (as may be amended from time to time) and, when it becomes available, other relevant material that will be filed with the SEC.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Principles Of Consolidation	'
	Principles of Consolidation. The consolidated financial statements include the accounts of Texas Industries, Inc. and all subsidiaries except for a joint venture in which the Company has a 40% equity interest. The joint venture is accounted for using the equity method. Certain amounts in the prior period financial statements have been reclassified to conform to the current period presentation.
Estimates	'
	Estimates. The preparation of financial statements and accompanying notes in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported. Actual results could differ from those estimates.
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments. The estimated fair value of each class of financial instrument as of February 28, 2014 and May 31, 2013 approximates its carrying value except for long-term debt having fixed interest rates. The fair value of our long-term debt is estimated based on broker/dealer quoted market prices, which are level two inputs. As of February 28, 2014, the fair value of our long-term debt, including the current portion, was approximately $762.8 million compared to the carrying amount of $658.8 million. As of May 31, 2013, the fair value of our long-term debt, including the current portion, was approximately $723.2 million compared to the carrying amount of $659.8 million.
Cash And Cash Equivalents	'
	Cash and Cash Equivalents. Investments with maturities of less than 90 days when purchased are classified as cash equivalents and consist primarily of money market funds and investment grade commercial paper issued by major corporations and financial institutions.
Receivables	'
	Receivables. Management evaluates the ability to collect accounts receivable based on a combination of factors. A reserve for doubtful accounts is maintained based on the length of time receivables are past due or the status of a customer’s financial condition. If we are aware of a specific customer’s inability to make required payments, specific amounts are added to the reserve.
Environmental Liabilities	'
	Environmental Liabilities. We are subject to environmental laws and regulations established by federal, state and local authorities, and make provision for the estimated costs related to compliance when it is probable that an estimable liability has been incurred.
Legal Contingencies	'
	Legal Contingencies. We are a defendant in lawsuits which arose in the normal course of business and make provision for the estimated loss from any claim or legal proceeding when it is probable that an estimable liability has been incurred.
Inventories	'
	Inventories. Inventories are stated at the lower of cost or market. We use the last-in, first out (“LIFO”) method to value finished products, work in process and raw material inventories, excluding natural aggregate inventories. We use the average cost method to value natural aggregate finished goods and raw materials, and parts and supplies, which includes emission allowance credits. Our natural aggregate inventory includes a reserve against volumes in excess of an average twelve-month period of actual sales.
Long-lived Assets	'
	Long-lived Assets. Management reviews long-lived assets on a facility by facility basis for impairment whenever changes in circumstances indicate that the carrying amount of the assets may not be recoverable and would record an impairment charge if necessary. Such evaluations compare the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset and are significantly impacted by estimates of future prices for our products, capital needs, economic trends and other factors. Estimates of future cash flows reflect Management’s belief that it operates in a cyclical industry.
	Property, plant and equipment is recorded at cost. Costs incurred to construct certain long-lived assets include capitalized interest which is amortized over the estimated useful life of the related asset. Interest is capitalized during the construction period of qualified assets based on the average amount of accumulated expenditures and the weighted average interest rate applicable to borrowings outstanding during the period. If accumulated expenditures exceed applicable borrowings outstanding during the period, capitalized interest is allocated to projects under construction on a pro rata basis. Provisions for depreciation are computed generally using the straight-line method. Useful lives for our primary operating facilities range from 10 to 25 years with certain cement facility structures having useful lives of 40 years. Provisions for depletion of mineral deposits are computed on the basis of the estimated quantity of recoverable raw materials. The costs of removing overburden and waste materials to access mineral deposits are referred to as stripping costs. All production phase stripping costs are recognized as costs of the inventory produced during the period the stripping costs are incurred. Maintenance and repairs are charged to expense as incurred.
Goodwill and Goodwill Impairment	'
	Goodwill and Goodwill Impairment. Management tests goodwill for impairment annually by reporting unit in the fourth quarter of our fiscal year. Management may make optional use of the qualitative assessment provided by the accounting guidance as part of its annual testing. The accounting guidance permits an entity to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If this is concluded to be the case then management would proceed with the quantitative impairment test using a two-step process. Otherwise, the quantitative impairment test is not required.
	The first step of the quantitative impairment test identifies potential impairment by comparing the fair value of a reporting unit to its carrying value including goodwill. In applying a fair-value based test, estimates are made of the expected future cash flows to be derived from the reporting unit. Similar to the review for impairment of other long-lived assets, the resulting fair value determination is significantly impacted by estimates of future prices for our products, capital needs, economic trends and other factors. If the carrying value of the reporting unit exceeds its fair value, the second step of the quantitative impairment test is performed to measure the amount of impairment loss, if any. The second step of the impairment test compares the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill. If the carrying value of the reporting unit goodwill exceeds the implied fair value of the goodwill, an impairment loss is recognized in an amount equal to that excess. The implied fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination.
	Goodwill resulting primarily from the acquisition of ready-mix operations in Texas and Louisiana and identified with our concrete operations has a carrying value of $40.1 million at February 28, 2014 and $40.6 million at May 31, 2013.
Income Taxes	'
	Income Taxes. Texas Industries, Inc. (the parent company) joins in filing a consolidated return with its subsidiaries based on federal and certain state tax filing requirements. Certain subsidiaries also file separate state income tax returns. Current and deferred tax expense is allocated among the members of the group based on a stand-alone calculation of the tax of the individual member. We recognize and classify deferred income taxes using an asset and liability method, whereby deferred tax assets and liabilities are recognized based on the tax effect of temporary differences between the financial statements and the tax basis of assets and liabilities, as measured by current enacted tax rates.
	We calculate our current and deferred tax provision based on estimates and assumptions that could differ from the actual results reflected in income tax returns filed during subsequent years. Adjustments based on filed returns are generally recorded in the year the tax returns are filed.
	The amount of income tax we pay is subject to ongoing audits by federal and state authorities which may result in proposed assessments. Our estimate of the potential outcome for any uncertain tax issue is highly judgmental. We account for these uncertain tax issues using a two-step approach to recognizing and measuring uncertain tax positions taken or expected to be taken in a tax return. The first step determines if the weight of available evidence indicates that it is more likely than not that the tax position will be sustained on audit, including resolution of any related appeals or litigation processes. The second step measures the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. We adjust reserves for our uncertain tax positions due to changing facts and circumstances, the closing of a tax audit, judicial rulings, or realization of earnings or deductions that differ from our estimates. To the extent that the final outcome of these matters differs from the amounts recorded, such differences generally will impact our provision for income taxes in the period in which such a determination is made. Our provisions for income taxes include the impact of reserve provisions and changes to reserves that are considered appropriate including related interest and penalties.
	Management reviews our deferred tax position and in particular our deferred tax assets whenever circumstances indicate that the assets may not be realized in the future and recognizes a valuation allowance unless such deferred tax assets are deemed more likely than not to be recoverable. The ultimate realization of these deferred tax assets is dependent upon various factors including the generation of taxable income during future periods. In determining the need for a valuation allowance, we consider such factors as historical earnings, the reversal of existing temporary differences, prior taxable income (if carryback is permitted under the tax law), prudent and feasible tax planning strategies, and future taxable income. In the event we were to determine that we would not be able to realize all or part of our net deferred tax assets in the future, an adjustment to the deferred tax assets valuation allowance would be charged to earnings in the period in which we make such a determination. If we later determine that it is more likely than not that the net deferred tax assets would be realized, we would reverse the applicable portion of the previously provided valuation allowance as an adjustment to earnings at such time.
Real Estate and Investments	'
	Real Estate and Investments. Surplus real estate and real estate acquired for development of high quality industrial, office or multi-use parks totaled $6.6 million at February 28, 2014 and $7.3 million at May 31, 2013.
	Investments include life insurance contracts purchased in connection with certain of our benefit plans. The contracts, recorded at their net cash surrender value, totaled $1.6 million (net of distributions of $97.6 million plus accrued interest and fees) at February 28, 2014 and $1.1 million (net of distributions of $99.8 million plus accrued interest and fees) at May 31, 2013. We can elect to receive distributions chargeable against the cash surrender value of the policies in the form of borrowings or withdrawals or we can elect to surrender the policies and receive their net cash surrender value.
	Investments include the long-term portion of a note receivable totaling $6.7 million at February 28, 2014 and $6.2 million at May 31, 2013 in connection with the sale of our expanded shale and clay lightweight aggregates manufacturing businesses related to certain inventories.
Investment in Joint Venture	'
	Investment in Joint Venture. We own a 40% equity interest in a joint venture based in Waco, Texas that operates ready-mix plants serving the central Texas market. The day to day business operations are managed by the 60% partner in the venture. We supply cement to the joint venture. The debt of the joint venture is secured by the underlying assets of the joint venture. In addition, our partner has guaranteed 100% of the debt of the joint venture. We were released in the second quarter of fiscal year 2014 from our 50% guarantee of the debt of the joint venture. See further discussion of joint venture debt under Guarantee of Joint Venture Debt in Note 4.
	Our investment totaled $16.9 million at February 28, 2014 and $14.9 million at May 31, 2013. Our equity in income of the joint venture was $2.6 million and $1.6 million for the nine-month periods ended February 28, 2014 and 2013, respectively.
Deferred Other Charges	'
	Deferred Other Charges. Deferred other charges totaled $19.7 million at February 28, 2014 and $18.8 million at May 31, 2013. These balance totals include debt issuance costs of $9.7 million at February 28, 2014 and $11.1 million at May 31, 2013, which amortize over the term of the related debt. Also, these charges include $5.7 million and $2.9 million representing various miscellaneous receivables
Other Credits	'
	Other Credits. Deferred taxes and other credits totaled $81.3 million at February 28, 2014 and $91.2 million at May 31, 2013 and are composed primarily of liabilities related to our deferred income taxes, retirement plans, deferred compensation agreements and asset retirement obligations.
Asset Retirement Obligations	'
	Asset Retirement Obligations. We record a liability for legal obligations associated with the retirement of our long-lived assets in the period in which it is incurred if an estimate of fair value of the obligation can be made. The discounted fair value of the obligations incurred in each period is added to the carrying amount of the associated assets and depreciated over the lives of the assets. The liability accretes at the end of each period through a charge to operating expense. A gain or loss on settlement is recognized if the obligation is settled for other than the carrying amount of the liability.
	We incur legal obligations for asset retirement as part of our normal operations related to land reclamation, plant removal and Resource Conservation and Recovery Act closures. Determining the amount of an asset retirement liability requires estimating the future cost of contracting with third parties to perform the obligation. The estimate is significantly impacted by, among other considerations, management’s assumptions regarding the scope of the work required, labor costs, inflation rates, market-risk premiums and closure dates.
Accumulated Other Comprehensive Loss	'
	Accumulated Other Comprehensive Loss. Amounts recognized in accumulated other comprehensive loss represent adjustments related to a defined benefit retirement plan and a postretirement health benefit plan covering approximately 600 employees and retirees of our California cement subsidiary. The amounts totaled $15.2 million (net of tax benefit of $0.7 million) at February 28, 2014 and $18.4 million (net of tax benefit of $2.5 million) at May 31, 2013.
Net Sales	'
	Net Sales. Sales are recognized when title has transferred and products are delivered. We include delivery fees in the amount we bill customers to the extent needed to recover our cost of freight and delivery. Net sales are presented as revenues and include these delivery fees.
Other Income	'
	Other Income. Routine sales of surplus operating assets and real estate resulted in gains of $0.3 million and $1.9 million in the three-month periods ended February 28, 2014 and 2013, respectively, and $6.1 million and $4.8 million in the nine-month periods ended February 28, 2014 and 2013, respectively. In addition, other income includes earnings from a joint venture of $0.8 million and $0.5 million in the three-month periods ended February 28, 2014 and 2013, respectively, and $2.6 million and $1.6 million in the nine-month periods ended February 28, 2014 and 2013, respectively.
Stock-Based Compensation	'
	Stock-based Compensation. We have provided stock-based compensation to employees and non-employee directors in the form of non-qualified and incentive stock options, restricted stock, restricted stock units, stock appreciation rights, deferred compensation agreements and stock awards. The Company began issuing restricted stock units subject to service-based only conditions for the first time to employees in the prior fiscal year. In addition, the Company issued restricted stock units subject to market- and service-based conditions for the first time to employees during the nine-month period ended February 28, 2014.
	We use the Black-Scholes option-pricing model to determine the fair value of stock options and stock appreciation rights granted as of the date of grant. Options with graded vesting are valued as single awards and the related compensation cost is recognized using a straight-line attribution method over the shorter of the vesting period or required service period adjusted for estimated forfeitures.
	We use the closing stock price on the date of grant to determine the fair value of restricted stock units subject to service-based only conditions. The restricted stock units subject to service-based only conditions have cliff vesting at the end of a four year term, and we valued them as a single award with the related compensation cost recognized using a straight-line method over the vesting period adjusted for estimated forfeitures.
	We use a Monte Carlo simulation to determine the fair value of restricted stock units subject to market- and service-based conditions. The restricted stock units subject to market- and service-based conditions have cliff vesting at the end of a four year term subject to the achievement of market conditions, and we valued them as a single award with the related compensation cost recognized using a straight-line method over the vesting period adjusted for estimated forfeitures.
	We used the closing stock price on the date of grant to determine the fair value of stock awards and restricted stock awards. Prior to our executing the January 4, 2013 stock appreciation rights agreement and the deferred compensation agreements, we recorded a liability, which was included in other credits, for deferred compensation agreements and stock awards expected to be settled in cash, based on their fair value at the end of each period until such awards are paid.
Earnings Per Share	'
	Earnings Per Share (“EPS”). Income or loss allocated to common shareholders adjusts net income or loss for the participation in earnings of unvested restricted shares outstanding.
	Basic weighted-average number of common shares outstanding during the period includes contingently issuable shares and excludes outstanding unvested restricted shares. Contingently issuable shares outstanding at February 28, 2014 and 2013, relate to deferred compensation agreements in which directors elected to defer their fees. The deferred compensation is denominated in shares of our common stock and issued in accordance with the terms of the agreement subsequent to retirement or separation from us. The shares are considered contingently issuable because the director has an unconditional right to the shares to be issued.
	Diluted weighted-average number of common shares outstanding during the period adjusts basic weighted-average shares for the dilutive effect of stock options, restricted shares, restricted share units and awards.
Recently Issued Accounting Guidance	'
	Recently Issued Accounting Guidance. In July 2013, the Financial Accounting Standards Board issued new accounting guidance on the presentation of unrecognized tax benefits. This new guidance requires an entity to present an unrecognized tax benefit, or a portion of an unrecognized tax benefit, as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The new guidance becomes effective for us in our first quarter of fiscal 2015 with earlier adoption permitted, and should be applied prospectively with retroactive application permitted. We are currently evaluating the impact of the new guidance, and do not expect it to have a material effect on our consolidated financial statements.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Changes in Asset Retirement Obligations	'
	Changes in asset retirement obligations are as follows:
		Nine months ended
		February 28,			February 28,
	In thousands	2014			2013
	Balance at beginning of period	$	2,653		$	3,879
	Additions	83			219
	Accretion expense	212			130
	Settlements	(354		)	(1,617		)
	Balance at end of period	$	2,594		$	2,611
Calculation of Basic and Diluted EPS	'
	Basic and diluted EPS are calculated as follows:
		Three months ended						Nine months ended
		February 28,			February 28,			February 28,			February 28,
	In thousands except per share	2014			2013			2014			2013
	Earnings
	Net loss from continuing operations	$	(21,769	)	$	(8,513	)	$	(38,979	)	$	(26,098	)
	Net income from discontinued operations	$	—		$	2,699		$	—		$	6,504
	Loss allocated to common shareholders	$	(21,769	)	$	(5,814	)	$	(38,979	)	$	(19,594	)
	Shares
	Weighted-average shares outstanding	28,691			28,200			28,631			28,086
	Contingently issuable shares	5			4			5			3
	Unvested restricted shares	—			(14		)	(7		)	(16		)
	Basic weighted-average shares	28,696			28,190			28,629			28,073
	Diluted weighted-average shares (1)	28,696			28,190			28,629			28,073
	Net loss per share from continuing operations
	Basic	$	(0.76	)	$	(0.30	)	$	(1.36	)	$	(0.93	)
	Diluted	$	(0.76	)	$	(0.30	)	$	(1.36	)	$	(0.93	)
	Net income per share from discontinued operations
	Basic	$	—		$	0.09		$	—		$	0.23
	Diluted	$	—		$	0.09		$	—		$	0.23
	Net loss per share
	Basic	$	(0.76	)	$	(0.21	)	$	(1.36	)	$	(0.70	)
	Diluted	$	(0.76	)	$	(0.21	)	$	(1.36	)	$	(0.70	)
	(1)    Shares excluded due to antidilutive effect of stock options, restricted shares and awards	634			583			595			409

Discontinued_Operations_Tables

Discontinued Operations (Tables)	9 Months Ended
	Feb. 28, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Schedule of Disposal Groups	'
	The following table summarizes the revenue, earnings before and net of income tax expense on all discontinued operations for the three- and nine-month periods ended February 28, 2013:
		Three months ended			Nine months ended
			February 28,		February 28,
	In thousands		2013		2013
	Revenue from discontinued operations		$	13,844	$	42,758
	Income from discontinued operations, before taxes		$	4,206	$	10,070
	Income from discontinued operations, net of taxes		$	2,699	$	6,504

Working_Capital_Tables

Working Capital (Tables)	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Receivables	'
	Receivables-net consist of:
		February 28,		May 31,
	In thousands	2014		2013
	Trade notes and accounts receivable	$	126,207	$	126,070
	Other	604		852
		$	126,811	$	126,922
Inventories	'
	Inventories consist of:
		February 28,		May 31,
	In thousands	2014		2013
	Finished products	$	6,489	$	5,267
	Work in process	8,676		8,630
	Raw materials	20,971		20,090
	Total inventories at LIFO cost	36,136		33,987
	Natural aggregate finished products	19,753		21,836
	Raw materials	265		378
	Parts and supplies	51,756		48,853
	Total inventories at average cost	71,774		71,067
	Total inventories	$	107,910	$	105,054
Accrued Interest, Compensation and Other	'
	Accrued interest, compensation and other consists of:
		February 28,		May 31,
	In thousands	2014		2013
	Interest	$	2,761	$	17,801
	Compensation and employee benefits	15,503		15,439
	Casualty insurance claims	16,717		15,890
	Income taxes	2,359		4,666
	Property taxes and other	5,897		8,540
		$	43,237	$	62,336

LongTerm_Debt_Tables

Long-Term Debt (Tables)	9 Months Ended
	Feb. 28, 2014
Long-Term Debt	'
	Long-term debt consists of:
		February 28,		May 31,
	In thousands	2014		2013
	9.25% Senior notes due 2020 issued August 10, 2010 at par value	$	650,000	$	650,000
	Other	6,594		7,505
		656,594		657,505
	Capital lease obligations	1,994		2,057
	Other contractual obligations	245		245
		658,833		659,807
	Less current portion	2,036		1,872
		$	656,797	$	657,935
Notes Redemption Prices (Expressed as Percentages of Principal Amount)	'
	On and after August 15, 2015, we may redeem all or a part of the notes at the redemption prices (expressed as percentages of principal amount) set forth below plus accrued and unpaid interest if redeemed during the twelve-month period beginning on August 15 of the years indicated below:
	Year	Percentage
	2015	104.625	%
	2016	103.083	%
	2017	101.542	%
	2018 and thereafter	100	%

StockBased_Compensation_Plans_

Stock-Based Compensation Plans (Tables)	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Option Transactions	'
	A summary of option transactions for the nine-month period ended February 28, 2014, follows:
		Shares Under		Weighted-Average
		Option		Option Price
	Outstanding at May 31, 2013	1,508,533		$	40.68
	Exercised	(216,825	)	$	41.79
	Canceled	(28,383	)	$	62.86
	Outstanding at February 28, 2014	1,263,325		$	39.99
	Exercisable at February 28, 2014	880,365		$	42.62
Stock Options Outstanding	'
	The following table summarizes information about stock options outstanding as of February 28, 2014.
		Range of Exercise Prices
		$16.04 - $29.38			$33.57 - $48.60		$50.63 - $70.18
	Options outstanding
	Shares outstanding	432,764			530,561		300,000
	Weighted-average remaining life in years	6.88			5.38		2.83
	Weighted-average exercise price	$	27.83		$	39.73	$	57.98
	Options exercisable
	Shares exercisable	232,604			347,761		300,000
	Weighted-average remaining life in years	6.03			4.74		2.83
	Weighted-average exercise price	$	26.51		$	40.16	$	57.96

Retirement_Plans_Tables

Retirement Plans (Tables)	9 Months Ended
	Feb. 28, 2014
Riverside Defined Benefit Plans	'
Net Benefit Costs	'
	The expenses associated with the defined benefit pension plan and postretirement health benefit plan are included in the computation of total employee benefit cost which is allocated to costs of products sold and to selling, general, and administrative in the consolidated statement of operations. The expense (benefits) associated with these plans for the three-month and nine-month periods ended February 28, 2014 and 2013, was as follows:
		Three months ended						Nine months ended
		February 28,			February 28,			February 28,			February 28,
	In thousands	2014			2013			2014			2013
	Defined benefit pension plan
	Service cost	$	—		$	61		$	—		$	277
	Interest cost	683			635			2,049			1,978
	Expected return on plan assets	(851		)	(770		)	(2,553		)	(2,288		)
	Amortization of net actuarial loss	153			217			461			1,165
		$	(15	)	$	143		$	(43	)	$	1,132
	Postretirement health benefit plan
	Service cost	$	25		$	27		$	75		$	81
	Interest cost	72			88			216			264
	Amortization of prior service cost	(193		)	(195		)	(581		)	(581		)
	Amortization of net actuarial loss	59			129			172			387
		$	(37	)	$	49		$	(118	)	$	151
Financial Security Defined Benefit Plans	'
Net Benefit Costs	'
	The expenses associated with the financial security plan are included in the computation of total employee benefit cost which is allocated to costs of products sold and to selling, general, and administrative in the consolidated statement of operations. The costs of this plan for the three-month and nine-month periods ended February 28, 2014 and 2013, was as follows:
		Three months ended						Nine months ended
		February 28,			February 28,			February 28,			February 28,
	In thousands	2014			2013			2014			2013
	Service cost	$	536		$	593		$	1,608		$	1,778
	Interest cost	609			591			1,827			1,773
		$	1,145		$	1,184		$	3,435		$	3,551
	The financial security defined benefit plans were amended during the second quarter of fiscal year 2013. This amendment provided that effective December 31, 2012 the plans were frozen.

Legal_Proceedings_and_Continge1

Legal Proceedings and Contingent Liabilities (Tables)	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Employee Exposure Standards by Regulatory Agencies	'
	The SCAQMD compared the level of exposure at the air monitor on our property line with the following employee exposure standards established by regulatory agencies:
	Occupational Safety and Health Administration	5,000 ng/m³
	National Institute for Occupational Safety and Health	1,000 ng/m³
	California Environmental Protection Agency	200 ng/m³

Business_Segments_Tables

Business Segments (Tables)	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Summary of Operating Results and Certain Other Financial Data for Business Segments	'
	The following is a summary of operating results and certain other financial data for our business segments relating to continuing operations, and does not include information pertaining to discontinued operations.
		Three months ended						Nine months ended
		February 28,			February 28,			February 28,			February 28,
	In thousands	2014			2013			2014			2013
	Net sales
	Cement
	Sales to external customers	$	83,095		$	71,288		$	265,675		$	239,406
	Intersegment sales	17,642			9,277			52,173			29,807
	Aggregates
	Sales to external customers	31,094			25,439			98,857			94,738
	Intersegment sales	10,806			5,378			34,761			17,272
	Concrete
	Sales to external customers	93,639			44,632			285,270			149,431
	Intersegment sales	22			8			82			119
	Eliminations	(28,470		)	(14,663		)	(87,016		)	(47,198		)
	Total net sales	$	207,828		$	141,359		$	649,802		$	483,575
	Segment operating profit (loss)
	Cement	$	(1,614	)	$	9,849		$	16,073		$	24,328
	Aggregates	3,386			2,111			15,363			9,629
	Concrete	4,850			(4,262		)	9,464			(8,777		)
	Total segment operating profit	6,622			7,698			40,900			25,180
	Corporate	(11,197		)	(10,339		)	(27,596		)	(30,967		)
	Merger charges	(2,863		)	—			(2,863		)	—
	Interest	(17,409		)	(7,227		)	(52,203		)	(22,462		)
	Loss before income taxes	$	(24,847	)	$	(9,868	)	$	(41,762	)	$	(28,249	)
	Depreciation, depletion and amortization
	Cement	$	13,017		$	8,395		$	39,137		$	25,288
	Aggregates	2,601			3,166			8,674			9,840
	Concrete	3,160			2,281			9,965			6,128
	Corporate	316			254			780			700
	Total depreciation, depletion and amortization	$	19,094		$	14,096		$	58,556		$	41,956
	Capital expenditures
	Cement	$	5,713		$	13,803		$	22,128		$	54,588
	Aggregates	963			927			3,644			3,528
	Concrete	346			7,290			3,147			9,536
	Corporate	1,835			201			4,358			1,220
	Total capital expenditures	$	8,857		$	22,221		$	33,277		$	68,872
	Net sales by product
	Cement	$	75,713		$	63,811		$	240,466		$	213,215
	Aggregates	20,325			16,641			64,009			60,638
	Concrete	92,723			44,821			284,355			149,403
	Other products	3,123			2,025			8,740			7,540
	Delivery fees	15,944			14,061			52,232			52,779
	Total net sales	$	207,828		$	141,359		$	649,802		$	483,575
Summary of Asset Used in Each of Business Segments	'
	The following is a summary of assets used in each of our business segments.
	In thousands	February 28,			May 31,
		2014			2013
	Identifiable assets
	Cement	$	1,147,172		$	1,174,879
	Aggregates	159,580			168,255
	Concrete	187,901			182,839
	Corporate	92,377			109,852
	Total assets	$	1,587,030		$	1,635,825

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Information (Tables)	9 Months Ended
	Feb. 28, 2014
Text Block [Abstract]	'
Condensed Consolidating Balance Sheet	'
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating balance sheet at February 28, 2014
	Cash and cash equivalents	$	45,957		$	1,876		$	—		$	47,833
	Receivables – net	563			126,811			(563		)	126,811
	Inventories	—			107,910			—			107,910
	Deferred income taxes and prepaid expenses	927			19,285			(155		)	20,057
	Total current assets	47,447			255,882			(718		)	302,611
	Property, plant and equipment – net	—			1,192,855			—			1,192,855
	Goodwill	—			40,072			—			40,072
	Real estate and investments	1,624			30,156			—			31,780
	Deferred income taxes and other charges	208,438			10,015			(198,741		)	19,712
	Investment in subsidiaries	1,081,716			—			(1,081,716		)	—
	Long-term intercompany receivables	122,508			18,725			(141,233		)	—
	Total assets	$	1,461,733		$	1,547,705		$	(1,422,408	)	$	1,587,030
	Accounts payable	$	—		$	72,147		$	(563	)	$	71,584
	Accrued interest, compensation and other	8,526			34,866			(155		)	43,237
	Current portion of long-term debt	—			2,036			—			2,036
	Total current liabilities	8,526			109,049			(718		)	116,857
	Long-term debt	650,245			6,552			—			656,797
	Long-term intercompany payables	18,737			122,496			(141,233		)	—
	Deferred income taxes and other credits	52,137			227,892			(198,741		)	81,288
	Shareholders’ equity	732,088			1,081,716			(1,081,716		)	732,088
	Total liabilities and shareholders’ equity	$	1,461,733		$	1,547,705		$	(1,422,408	)	$	1,587,030
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating balance sheet at May 31, 2013
	Cash and cash equivalents	$	58,791		$	2,505		$	—		$	61,296
	Receivables – net	—			126,922			—			126,922
	Inventories	—			105,054			—			105,054
	Deferred income taxes and prepaid expenses	615			26,834			(155		)	27,294
	Total current assets	59,406			261,315			(155		)	320,566
	Property, plant and equipment – net	—			1,226,396			—			1,226,396
	Goodwill	—			40,575			—			40,575
	Real estate and investments	1,080			28,391			—			29,471
	Deferred income taxes and other charges	210,838			7,744			(199,765		)	18,817
	Investment in subsidiaries	1,061,854			—			(1,061,854		)	—
	Long-term intercompany receivables	167,778			18,743			(186,521		)	—
	Total assets	$	1,500,956		$	1,583,164		$	(1,448,295	)	$	1,635,825
	Accounts payable	$	46		$	69,015		$	—		$	69,061
	Accrued interest, compensation and other	26,416			36,075			(155		)	62,336
	Current portion of long-term debt	—			1,872			—			1,872
	Total current liabilities	26,462			106,962			(155		)	133,269
	Long-term debt	650,245			7,690			—			657,935
	Long-term intercompany payables	18,743			167,778			(186,521		)	—
	Deferred income taxes and other credits	52,042			238,880			(199,765		)	91,157
	Shareholders’ equity	753,464			1,061,854			(1,061,854		)	753,464
	Total liabilities and shareholders’ equity	$	1,500,956		$	1,583,164		$	(1,448,295	)	$	1,635,825
Condensed Consolidating Statement of Operations	'
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating statement of operations and comprehensive income (loss) for the three months ended February 28, 2014
	Net sales	$	—		$	207,828		$	—		$	207,828
	Cost of products sold	—			195,835			—			195,835
	Gross profit	—			11,993			—			11,993
	Selling, general and administrative	4,184			14,080			—			18,264
	Merger charges	2,863			—			—			2,863
	Interest	17,304			—			105			17,409
	Other income, net	(12		)	(1,684		)	—			(1,696		)
	Intercompany other (income) loss	(863		)	968			(105		)	—
	Loss from continuing operations before the following items	(23,476		)	(1,371		)	—			(24,847		)
	Income taxes (benefit)	(1,654		)	(1,424		)	—			(3,078		)
	Equity in earnings (loss) of subsidiaries	53			—			(53		)	—
	Net income (loss) from continuing operations	(21,769		)	53			(53		)	(21,769		)
	Net income from discontinued operations	—			—			—			—
	Net income (loss)	$	(21,769	)	$	53		$	(53	)	$	(21,769	)
	Comprehensive income (loss)	$	(21,769	)	$	3,210		$	(53	)	$	(18,612	)
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating statement of operations and comprehensive income (loss) for the three months ended February 28, 2013
	Net sales	$	—		$	141,359		$	—		$	141,359
	Cost of products sold	—			129,035			—			129,035
	Gross profit	—			12,324			—			12,324
	Selling, general and administrative	2,762			14,294			—			17,056
	Interest	17,309			—			(10,082		)	7,227
	Other income, net	(13		)	(2,078		)	—			(2,091		)
	Intercompany other (income) loss	(863		)	(9,219		)	10,082			—
	Income (loss) from continuing operations before the following items	(19,195		)	9,327			—			(9,868		)
	Income taxes (benefit)	517			(1,872		)	—			(1,355		)
	Equity in earnings of subsidiaries	13,898			—			(13,898		)	—
	Net income (loss) from continuing operations	(5,814		)	11,199			(13,898		)	(8,513		)
	Net income from discontinued operations	—			2,699			—			2,699
	Net income (loss)	$	(5,814	)	$	13,898		$	(13,898	)	$	(5,814	)
	Comprehensive income (loss)	$	(5,814	)	$	13,994		$	(13,898	)	$	(5,718	)
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating statement of operations and comprehensive income (loss) for the nine months ended February 28, 2014
	Net sales	$	—		$	649,802		$	—		$	649,802
	Cost of products sold	—			592,986			—			592,986
	Gross profit	—			56,816			—			56,816
	Selling, general and administrative	8,643			47,828			—			56,471
	Merger charges	2,863			—			—			2,863
	Interest	51,877			—			326			52,203
	Other income, net	(70		)	(12,889		)	—			(12,959		)
	Intercompany other (income) loss	(2,618		)	2,944			(326		)	—
	Income (loss) from continuing operations before the following items	(60,695		)	18,933			—			(41,762		)
	Income taxes (benefit)	(2,169		)	(614		)	—			(2,783		)
	Equity in earnings of subsidiaries	19,547			—			(19,547		)	—
	Net income (loss) from continuing operations	$	(38,979	)	$	19,547		$	(19,547	)	$	(38,979	)
	Net income from discontinued operations	$	—		$	—		$	—		$	—
	Net income (loss)	$	(38,979	)	$	19,547		$	(19,547	)	$	(38,979	)
	Comprehensive income (loss)	$	(38,979	)	$	22,724		$	(19,547	)	$	(35,802	)
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating statement of operations and comprehensive income (loss) for the nine months ended February 28, 2013
	Net sales	$	—		$	483,575		$	—		$	483,575
	Cost of products sold	—			444,297			—			444,297
	Gross profit	—			39,278			—			39,278
	Selling, general and administrative	7,446			44,233			—			51,679
	Interest	51,545			—			(29,083		)	22,462
	Other income, net	(62		)	(6,552		)	—			(6,614		)
	Intercompany other (income) loss	(2,618		)	(26,465		)	29,083			—
Income (loss) from continuing operations before the following items	(56,311		)	28,062			—			(28,249		)
Income taxes (benefit)	441			(2,592		)	—			(2,151		)
Equity in earnings of subsidiaries	37,159			—			(37,159		)	—
Net income (loss) from continuing operations	(19,593		)	30,654			(37,159		)	(26,098		)
Net income from discontinued operations	—			6,504			—			6,504
Net income (loss)	$	(19,593	)	$	37,158		$	(37,159	)	$	(19,594	)
Comprehensive Income (loss)	$	(19,593	)	$	37,719		$	(37,159	)	$	(19,033	)
Condensed Consolidating Statement of Cash Flows	'
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating statement of cash flows for the nine months ended February 28, 2014 (unaudited)
	Net cash provided (used) by operating activities	$	(71,557	)	$	70,892		$	—		$	(665	)
	Investing activities
	Capital expenditures – expansions	—			(7,125		)	—			(7,125		)
	Capital expenditures – other	—			(26,152		)	—			(26,152		)
	Proceeds from asset disposals	—			8,390			—			8,390
	Proceeds from insurance contracts, net of premiums paid	4,386			—			—			4,386
	Net cash provided (used) by investing activities	4,386			(24,887		)	—			(20,501		)
	Financing activities
	Debt payments	—			(1,373		)	—			(1,373		)
	Stock option exercises	9,076			—			—			9,076
	Net intercompany financing activities	45,261			(45,261		)	—			—
	Net cash provided (used) by financing activities	54,337			(46,634		)	—			7,703
	Decrease in cash and cash equivalents	(12,834		)	(629		)	—			(13,463		)
	Cash and cash equivalents at beginning of period	58,791			2,505			—			61,296
	Cash and cash equivalents at end of period	$	45,957		$	1,876		$	—		$	47,833
	In thousands	Texas			Guarantor			Consolidating			Consolidated
		Industries, Inc.			Subsidiaries			Adjustments
	Condensed consolidating statement of cash flows for the nine months ended February 28, 2013 (unaudited)
	Net cash provided (used) by operating activities	$	(88,158	)	$	97,929		$	—		$	9,771
	Investing activities
	Capital expenditures – expansions	—			(61,344		)	—			(61,344		)
	Capital expenditures – other	—			(17,752		)	—			(17,752		)
	Proceeds from asset disposals	—			5,783			—			5,783
	Proceeds from insurance contracts, net of premiums paid	2,366			—			—			2,366
	Other – net	—			(67		)	—			(67		)
	Net cash provided (used) by investing activities	2,366			(73,380		)	—			(71,014		)
	Financing activities
	Debt payments	(4		)	(2,232		)	—			(2,236		)
	Stock option exercises	7,116			—			—			7,116
	Net intercompany financing activities	20,382			(20,382		)	—			—
	Net cash provided (used) by financing activities	27,494			(22,614		)	—			4,880
	Increase (decrease) in cash and cash equivalents	(58,298		)	1,935			—			(56,363		)
	Cash and cash equivalents at beginning of period	84,713			3,314			—			88,027
	Cash and cash equivalents at end of period	$	26,415		$	5,249		$	—		$	31,664

Recovered_Sheet1

Summary Of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013	31-May-13
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'
Equity interest in joint venture	40.00%	'	40.00%	'	'
Fair value of long-term debt, including current portion	$762,800,000	'	$762,800,000	'	$723,200,000
Long-term debt, carrying amount	658,833,000	'	658,833,000	'	659,807,000
Maturity period for investments to be classified cash and cash equivalents, days	'	'	'90 days	'	'
Goodwill resulting from acquisition	40,072,000	'	40,072,000	'	40,575,000
Percentage of tax benefit likely to be realized upon ultimate settlement	'	'	50.00%	'	'
Real estate acquired for development	'	'	6,600,000	'	7,300,000
Life insurance contracts recorded net cash	1,600,000	'	1,600,000	'	1,100,000
Insurance policy distributions	'	'	97,600,000	'	99,800,000
Long-term portion of a note received in connection with the sale of our expanded shale and clay lightweight aggregates manufacturing businesses related to certain inventories - included in Deferred Other Charges	6,700,000	'	6,700,000	'	6,200,000
Joint venture debt guaranteed percentage	'	'	50.00%	'	'
Fair value of equity	16,900,000	'	16,900,000	'	14,900,000
Equity income in joint venture	800,000	500,000	2,600,000	1,600,000	'
Deferred other charges	'	'	19,700,000	'	18,800,000
Debt issuance costs	9,700,000	'	9,700,000	'	11,100,000
Various long-term receivables	5,700,000	'	5,700,000	'	2,900,000
Other credits	81,300,000	'	81,300,000	'	91,200,000
Accumulated other comprehensive loss, adjustments related to defined benefit retirement plan and postretirement health benefit plan, net of tax	15,200,000	'	15,200,000	'	18,400,000
Accumulated other comprehensive loss, adjustments related to defined benefit retirement plan and postretirement health benefit plan, tax	700,000	'	700,000	'	2,500,000
Merger Charges	2,863,000	0	2,863,000	0	'
Reclassification out of Accumulated Other Comprehensive Income	'	'	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'
Cost of goods sold and Selling, general and administrative expense	'	'	100,000	1,000,000	'
Co-venturer	'	'	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'
Partner's percentage in the venture	60.00%	'	60.00%	'	'
Joint venture debt guaranteed percentage	'	'	100.00%	'	'
Real Estate	'	'	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'
Gain on asset exchange	300,000	1,900,000	6,100,000	4,800,000	'
Riverside Defined Benefit Plans	'	'	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'
Approximate number of employees and retirees of subsidiary	'	'	600	'	'
Minimum	'	'	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'
Long-lived assets useful life	'	'	'10 years	'	'
Maximum	'	'	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'
Long-lived assets useful life	'	'	'25 years	'	'
Cement Facility	'	'	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'
Long-lived assets useful life	'	'	'40 years	'	'
Ready-Mix Concrete	'	'	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'
Goodwill resulting from acquisition	$40,100,000	'	$40,100,000	'	$40,600,000
Restricted Stock Units (RSUs)	'	'	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'
Award vesting period	'	'	'4 years	'	'

Changes_in_Asset_Retirement_Ob

Changes in Asset Retirement Obligations (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013
Accounting Policies [Abstract]	'	'
Balance at beginning of period	$2,653	$3,879
Additions	83	219
Accretion expense	212	130
Settlements	-354	-1,617
Balance at end of period	$2,594	$2,611

Calculation_of_Basic_and_Dilut

Calculation of Basic and Diluted EPS (Detail) (USD $)	3 Months Ended				9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Feb. 28, 2014		Feb. 28, 2013		Feb. 28, 2014		Feb. 28, 2013
Earnings	'		'		'		'
Net loss from continuing operations	($21,769)		($8,513)		($38,979)		($26,098)
Net income from discontinued operations	0		2,699		0		6,504
Loss allocated to common shareholders	($21,769)		($5,814)		($38,979)		($19,594)
Shares	'		'		'		'
Weighted-average shares outstanding (in shares)	28,691		28,200		28,631		28,086
Contingently issuable shares (in shares)	5		4		5		3
Unvested restricted shares (in shares)	0		-14		-7		-16
Basic weighted-average shares (in shares)	28,696		28,190		28,629		28,073
Diluted weighted-average shares (1) (in shares)	28,696	[1]	28,190	[1]	28,629	[1]	28,073	[1]
NET LOSS PER SHARE FROM CONTINUING OPERATIONS:	'		'		'		'
Basic (in USD per share)	($0.76)		($0.30)		($1.36)		($0.93)
Diluted (in USD per share)	($0.76)		($0.30)		($1.36)		($0.93)
NET INCOME PER SHARE FROM DISCONTINUED OPERATIONS:	'		'		'		'
Basic (in USD per share)	$0		$0.09		$0		$0.23
Diluted (in USD per share)	$0		$0.09		$0		$0.23
NET LOSS PER SHARE:	'		'		'		'
Basic (in USD per share)	($0.76)		($0.21)		($1.36)		($0.70)
Diluted (in USD per share)	($0.76)		($0.21)		($1.36)		($0.70)
Shares excluded due to antidilutive effect of stock options, restricted shares and awards (in shares)	634		583		595		409
[1]	Shares excluded due to antidilutive effect of stock options, restricted shares and awards

Discontinued_Operations_Additi

Discontinued Operations - Additional Information (Details)	0 Months Ended
	Mar. 22, 2013
	Property
Ready-Mix Concrete	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'
Number of assets acquired in noncash asset exchange	42
Aggregates	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'
Number of assets acquired in noncash asset exchange	2

Discontinued_Operations_Schedu

Discontinued Operations - Schedule of Balance Sheet and Income Statement Items (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Revenue and Income:	'	'	'	'
Revenue from discontinued operations	'	$13,844	'	$42,758
Income from discontinued operations, before taxes	'	4,206	'	10,070
Income from discontinued operations, net of taxes	$0	$2,699	$0	$6,504

Working_Capital_Additional_Inf

Working Capital - Additional Information (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013	31-May-13
Working Capital Detail [Line Items]	'	'	'
Working capital	$185.80	'	$187.30
Allowances for doubtful receivables	3.5	'	2.3
Provisions for bad debts	1.4	0.9	'
Uncollectible accounts written off	0.1	0.5	'
Average Cost	'	'	'
Working Capital Detail [Line Items]	'	'	'
Amount inventory values would be higher by average cost method	$21.70	'	$20.70

Receivables_Detail

Receivables (Detail) (USD $)	Feb. 28, 2014	31-May-13
In Thousands, unless otherwise specified
Working Capital [Abstract]	'	'
Trade notes and accounts receivable	$126,207	$126,070
Other	604	852
Receivables, total	$126,811	$126,922

Inventories_Detail

Inventories (Detail) (USD $)	Feb. 28, 2014	31-May-13
In Thousands, unless otherwise specified
Working Capital Detail [Line Items]	'	'
Inventories	$107,910	$105,054
Lifo Cost	'	'
Working Capital Detail [Line Items]	'	'
Finished products	6,489	5,267
Work in process	8,676	8,630
Raw materials	20,971	20,090
Total inventories at LIFO cost	36,136	33,987
Average Cost	'	'
Working Capital Detail [Line Items]	'	'
Finished products	19,753	21,836
Raw materials	265	378
Parts and supplies	51,756	48,853
Total inventories at average cost	$71,774	$71,067

Accrued_Interest_Compensation_

Accrued Interest, Compensation and Other (Detail) (USD $)	Feb. 28, 2014	31-May-13
In Thousands, unless otherwise specified
Working Capital [Abstract]	'	'
Interest	$2,761	$17,801
Compensation and employee benefits	15,503	15,439
Casualty insurance claims	16,717	15,890
Income taxes	2,359	4,666
Property taxes and other	5,897	8,540
Accrued interest, compensation and other, total	$43,237	$62,336

LongTerm_Debt_Detail

Long-Term Debt (Detail) (USD $)	Feb. 28, 2014	31-May-13
In Thousands, unless otherwise specified
Disclosure Long Term Debt [Abstract]	'	'
9.25% Senior notes due 2020 issued August 10, 2010 at par value	$650,000	$650,000
Other	6,594	7,505
Total long term debt	656,594	657,505
Capital lease obligations	1,994	2,057
Other contractual obligations	245	245
Long-term debt and capital lease obligations	658,833	659,807
Less current portion	2,036	1,872
LONG-TERM DEBT	$656,797	$657,935

LongTerm_Debt_Parenthetical_De

Long-Term Debt (Parenthetical) (Detail)	1 Months Ended	9 Months Ended	0 Months Ended	1 Months Ended	9 Months Ended
	Aug. 25, 2011	Feb. 28, 2014	Aug. 10, 2010	Aug. 10, 2010	Feb. 28, 2014
	Senior Secured Revolving Credit Facility	Senior Secured Revolving Credit Facility	9.25% Senior Notes	9.25% Senior Notes	9.25% Senior Notes
Debt Instrument [Line Items]	'	'	'	'	'
Credit facility expiration date	'August 25, 2016	'August 25, 2016	'	'	'
Senior notes, interest rate	'	'	9.25%	9.25%	9.25%
Senior notes maturity date	'	'	'2020	'2020	'2020

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail) (USD $)

3 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

1 Months Ended

0 Months Ended

0 Months Ended

1 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Feb. 28, 2014

Feb. 28, 2013

Feb. 28, 2014

Feb. 28, 2013

Feb. 28, 2014

Feb. 28, 2014

Aug. 25, 2011

Feb. 28, 2014

Aug. 25, 2011

Aug. 25, 2011

Aug. 25, 2011

Aug. 25, 2011

Aug. 25, 2011

Aug. 25, 2011

Aug. 25, 2011

Aug. 25, 2011

Aug. 25, 2011

Aug. 25, 2011

Feb. 28, 2014

Aug. 10, 2010

Aug. 10, 2010

Feb. 28, 2014

Aug. 10, 2010

payment

Maximum Increase

Minimum Increase

Senior Secured Revolving Credit Facility

Senior Secured Revolving Credit Facility

Senior Secured Revolving Credit Facility

Senior Secured Revolving Credit Facility

Sub-Limit For Letters Of Credit

Sub-Limit Swing Line Loans

Libor Rate Plus

Libor Rate Plus

Base Rate Plus

Base Rate Plus

Federal Funds Rate Plus

One-Month Libor Rate Plus

Credit Agreement

9.25% Senior Notes

9.25% Senior Notes

9.25% Senior Notes

7.25% Senior Notes Due 2013

Minimum

Maximum

Minimum

Maximum

Minimum

Maximum

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum amount available to borrow under agreement

'

'

'

'

'

'

$200

'

'

'

$50

$15

'

'

'

'

'

'

'

'

'

'

'

Credit facility expiration date

'

'

'

'

'

'

'August 25, 2016

'August 25, 2016

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility, interest rate description

'

'

'

'

'

'

'Amounts drawn under the credit facility bear annual interest either at the LIBOR rate plus a margin of 2.0% to 2.75% or at a base rate plus a margin of 1.0% to 1.75%. The base rate is the higher of the federal funds rate plus 0.5%, the prime rate established by Bank of America, N.A. or the one-month LIBOR rate plus 1.0%. The interest rate margins are determined based on the Company’s fixed charge coverage ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Variable interest rate

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

2.75%

1.00%

1.75%

0.50%

1.00%

'

'

'

'

'

Commitment fee calculated on unused portion per year

'

'

'

'

'

'

'

'

0.38%

0.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

Borrowing base agreement amount

140.7

'

140.7

'

20

10.7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unused portion of borrowing amount

25

'

25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fixed charge coverage ratio, maximum allowed according to covenant

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fixed charge coverage ratio

0.92

'

0.92

'

'

'

'

1

'

'

'

'

'

'

'

'

'

'

1

'

'

'

'

Borrowing limited to an amount under credit facility

115.7

'

115.7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Borrowings outstanding

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Borrowing base used to support letters of credit

'

'

31.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility, remaining borrowing capacity

84.5

'

84.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Future foreign subsidiaries equity interest available for credit facility guarantees

66.00%

'

66.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility, covenant terms

'

'

'The credit agreement contains a number of covenants restricting, among other things, prepayment or redemption of our senior notes, distributions and dividends on and repurchases of our capital stock, acquisitions and investments, indebtedness, liens and affiliate transactions. We are permitted to pay cash dividends on our common stock as long as the credit facility is not in default, the fixed charge coverage ratio is greater than 1.0 to 1.0 and borrowing availability under the borrowing base is more than $40 million. When our fixed charge coverage ratio is less than 1.0 to 1.0, we are permitted to pay cash dividends on our common stock not to exceed $2.5 million in any single instance (which shall not occur more than four times in any calendar year) or $10 million in the aggregate during any calendar year as long as the credit facility is not in default and borrowing availability is more than the greater of $60 million or 30% of the aggregate commitments of all lenders.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Borrowing availability under credit agreement

40

'

40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash dividend on common stock

'

'

2.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of cash dividend payments allowed annually, maximum

'

'

4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Permitted to pay cash dividends on common stock aggregate during any calendar year

'

'

10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum borrowing availability required to pay cash dividends

60

'

60

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility percentage of aggregate commitments to lenders

'

'

30.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Senior note aggregate principal amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

650

650

650

'

Senior notes offering price in percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

Senior notes, interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9.25%

9.25%

9.25%

7.25%

Senior notes maturity date

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2020

'2020

'2020

'

Required purchase price of principal amount, percentage

'

'

101.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal payments due on long-term debt, year one

2

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal payments due on long-term debt, year two

2

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal payments due on long-term debt, year three

2

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal payments due on long-term debt, year four

0.9

'

0.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal payments due on long-term debt, year five

0.2

'

0.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest incurred on long-term debt

17.4

17.4

52.2

51.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest amount capitalized

10.2

'

'

29.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total amount of interest paid

'

'

$67

$66

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of joint venture's debt guaranteed

'

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notes_Redemption_Prices_Expres

Notes Redemption Prices (Expressed as Percentages of Principal Amount) (Detail)	9 Months Ended
	Feb. 28, 2014
Long-Term Debt [Abstract]	'
2015	104.63%
2016	103.08%
2017	101.54%
2018 and thereafter	100.00%

Shareholders_Equity_Additional

Shareholders' Equity - Additional Information (Detail) (USD $)	9 Months Ended
	Feb. 28, 2014
Cumulative Preferred Stock	'
Class of Stock [Line Items]	'
Authorized preferred stock, shares	100,000
Preferred stock, no par value	$0
Cumulative Preferred Stock (Voting)	'
Class of Stock [Line Items]	'
Authorized preferred stock, shares	20,000
Premium on preferred stock redemption	$5
Preferred stock redeemable price per share	$105
Preferred stock price per share upon dissolution	$100
Preferred stock shares outstanding	0
Series B Junior Participating Preferred Stock	'
Class of Stock [Line Items]	'
Authorized preferred stock, shares	40,000
Preferred stock shares outstanding	0

StockBased_Compensation_Plans_1

Stock-Based Compensation Plans - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Options, expiration period	'	'	'10 years	'
Options granted during period	0	'	0	'
Shares available for future awards	2,697,646	'	2,697,646	'
Closing market price of common stock	'	'	$84.90	'
Aggregate intrinsic value of stock options outstanding	$56.70	'	$56.70	'
Aggregate intrinsic value of exercisable stock options	37.2	'	37.2	'
Total intrinsic value of options exercised	5.8	5.3	6.6	6.3
Common stock reserved for the settlement of stock-based compensation	4,000,000	'	4,000,000	'
Liabilities increased (decreased) stock-based compensation	'	1	1.7	'
Tax expense recognized in statements of operations for stock-based compensation	'	'	0	0.1
Total unrecognized compensation cost related to stock options, restricted stock payments, and stock awards expected to be recognized	12.6	'	12.6	'
Unrecognized compensation cost related to stock options expected to be recognized, 2015	'	'	4.9	'
Unrecognized compensation cost related to stock options expected to be recognized, 2016	'	'	4.1	'
Unrecognized compensation cost related to stock options expected to be recognized, 2017	'	'	3.1	'
Unrecognized compensation cost related to stock options expected to be recognized, 2018	'	'	0.5	'
Selling, General and Administrative Expenses	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation included in selling, general and administrative expense	1.4	2.7	5.4	7
Selling, General and Administrative Expenses | Company's Directors	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation included in selling, general and administrative expense	'	'	$1	'
Restricted Stock Units (RSUs)	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Award vesting period	'	'	'4 years	'
RSUs granted	'	'	85,219	'
RSU granted, average stock price on date of grant	'	'	$70.68	'
Market-Based Restricted Stock Units (RSUs) [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
RSUs granted	'	'	54,512	'
Stock Appreciation Rights (SARs)	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation, outstanding	133,315	'	133,315	'
Deferred Compensation Agreements To Be Settled In Common Stock	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation, outstanding	5,495	'	5,495	'

Option_Transactions_Detail

Option Transactions (Detail) (USD $)	9 Months Ended
	Feb. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'
Shares Under Option, Outstanding at May 31, 2013	1,508,533
Shares Under Option, Exercised	-216,825
Shares Under Option, Canceled	-28,383
Shares Under Option, Outstanding at November 30, 2013	1,263,325
Shares Under Option, Exercisable at November 30, 2013	880,365
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]	'
Weighted-Average Option Price, Outstanding at May 31, 2013	$40.68
Weighted-Average Option Price, Exercised	$41.79
Weighted-Average Option Price, Canceled	$62.86
Weighted-Average Option Price, Outstanding at November 30, 2013	$39.99
Weighted-Average Option Price, Exercisable at November 30, 2013	$42.62

Stock_Options_Outstanding_Deta

Stock Options Outstanding (Detail) (USD $)	9 Months Ended
	Feb. 28, 2014
Range Of Exercise Prices, $16.04 - $29.38	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Shares outstanding	432,764
Weighted-average remaining life in years, Options outstanding	'6 years 10 months 17 days
Weighted-average exercise price, Options outstanding	$27.83
Shares exercisable	232,604
Weighted-average remaining life in years, Options exercisable	'6 years 0 months 11 days
Weighted-average exercise price, Options exercisable	$26.51
Range of Exercise Prices, minimum	$16.04
Range of Exercise Prices, maximum	$29.38
Range Of Exercise Prices, $33.57 - $48.60	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Shares outstanding	530,561
Weighted-average remaining life in years, Options outstanding	'5 years 4 months 17 days
Weighted-average exercise price, Options outstanding	$39.73
Shares exercisable	347,761
Weighted-average remaining life in years, Options exercisable	'4 years 8 months 27 days
Weighted-average exercise price, Options exercisable	$40.16
Range of Exercise Prices, minimum	$33.57
Range of Exercise Prices, maximum	$48.60
Range Of Exercise Prices, $50.63 - $70.18	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Shares outstanding	300,000
Weighted-average remaining life in years, Options outstanding	'2 years 9 months 29 days
Weighted-average exercise price, Options outstanding	$57.98
Shares exercisable	300,000
Weighted-average remaining life in years, Options exercisable	'2 years 9 months 29 days
Weighted-average exercise price, Options exercisable	$57.96
Range of Exercise Prices, minimum	$50.63
Range of Exercise Prices, maximum	$70.18

Retirement_Plans_Additional_In

Retirement Plans - Additional Information (Detail) (Riverside Defined Benefit Plans)	9 Months Ended
	Feb. 28, 2014
	Employee
Riverside Defined Benefit Plans	'
Defined Benefit Plan Disclosure [Line Items]	'
Approximate number of employees and retirees of subsidiary	600

Defined_Benefit_Pension_Plan_a

Defined Benefit Pension Plan and Postretirement Health Benefit Plan Expense (Detail) (Riverside Defined Benefit Plans, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Pension Plans, Defined Benefit	'	'	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'	'	'
Service cost	$0	$61	$0	$277
Interest cost	683	635	2,049	1,978
Expected return on plan assets	-851	-770	-2,553	-2,288
Amortization of net actuarial loss	153	217	461	1,165
Defined benefit pension plan, total	-15	143	-43	1,132
Defined Benefit Postretirement Health Coverage	'	'	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'	'	'
Service cost	25	27	75	81
Interest cost	72	88	216	264
Amortization of prior service cost	-193	-195	-581	-581
Amortization of net actuarial loss	59	129	172	387
Defined benefit pension plan, total	($37)	$49	($118)	$151

Amount_of_Financial_Security_P

Amount of Financial Security Plan Benefit Expense Charged to Costs and Expenses (Detail) (Financial Security Defined Benefit Plans, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Financial Security Defined Benefit Plans	'	'	'	'
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]	'	'	'	'
Service cost	$536	$593	$1,608	$1,778
Interest cost	609	591	1,827	1,773
Defined benefit pension plan, total	$1,145	$1,184	$3,435	$3,551

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	31-May-13	Feb. 28, 2014	Feb. 28, 2013
Income Tax Contingency [Line Items]	'	'	'
Federal statutory corporate rate	'	35.00%	'
Estimated annualized income tax rate	7.90%	5.40%	'
Received income tax refunds	'	$0.40	$0
Income tax payments	'	0	0
Net deferred tax assets	6.7	5	'
Net deferred tax assets classified as current	18.8	14.2	'
Tax Years 2007 Through 2010	'	'	'
Income Tax Contingency [Line Items]	'	'	'
Adjustment following IRS review of tax returns	'	$0	'

Recovered_Sheet2

Legal Proceedings And Contingent Liabilities - Additional Information (Detail)	9 Months Ended		2 Months Ended	9 Months Ended
	Feb. 28, 2014	31-May-08	Apr. 09, 2008	Feb. 28, 2014	Feb. 28, 2014	Feb. 28, 2014	Feb. 28, 2014	Feb. 28, 2014	Feb. 28, 2014	Feb. 28, 2014
	Plaintiff	case	Crestmore Plant	Crestmore Plant	Oro Grande Plant	Shellman Lawsuit	Maximum	Maximum	Assuming Continuous Exposure For Seventy Years	Assuming Continuous Exposure For Seventy Years
				Plaintiff	Plaintiff	LegalMatter	Crestmore Plant	Oro Grande Plant	Minimum	Maximum
				LegalMatter					Crestmore Plant	Crestmore Plant
									Person	Person
Loss Contingencies [Line Items]	'	'	'	'	'	'	'	'	'	'
Average level of hexavalent chromium, nanograms per cubic meter	'	'	2.43	'	'	'	1	1	'	'
Increase in risk of cancer, instances per million people	'	'	'	'	'	'	'	'	250	500
SCAQMD calculation of cancer risk, time frame assumption	'	'	'	'70 years	'	'	'	'	'	'
Number of excess cancer cases found by researcher for the period 1996-2005	'	0	'	'	'	'	'	'	'	'
Number of subsidiary defendants in class action lawsuit	'	'	'	3	'	'	'	'	'	'
Number of additional class action lawsuits filed	'	'	'	'	'	5	'	'	'	'
Number of lawsuits stayed	'	'	'	'	'	4	'	'	'	'
Number of individual plaintiffs involved in lawsuit	'	'	'	3,000	300	'	'	'	'	'
Number of plaintiffs remaining	'	'	'	2,000	250	'	'	'	'	'
Number of individual plaintiffs for which trial date has been set	14	'	'	'	'	'	'	'	'	'

Employee_Exposure_Standards_by

Employee Exposure Standards by Regulatory Agencies (Detail) (Maximum)	9 Months Ended
	Feb. 28, 2014
Occupational Safety And Health Administration	'
Loss Contingencies [Line Items]	'
Employee exposure standards, nanograms per cubic meter	5,000
National Institute For Occupational Safety And Health	'
Loss Contingencies [Line Items]	'
Employee exposure standards, nanograms per cubic meter	1,000
California Environmental Protection Agency	'
Loss Contingencies [Line Items]	'
Employee exposure standards, nanograms per cubic meter	200

Business_Segments_Additional_I

Business Segments - Additional Information (Detail) (USD $)	9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
	Segment
Segment Reporting Information [Line Items]	'	'
Number of operating business segments	3	'
Upgrades of existing equipment and acquisitions	$26,152,000	$17,752,000
Capital expenditure incurred for expansion	7,125,000	61,344,000
Hunter Cement Plant	'	'
Segment Reporting Information [Line Items]	'	'
Capital expenditure incurred for expansion	7,100,000	61,300,000
Capitalized interest paid	'	$38,500,000
Maximum	'	'
Segment Reporting Information [Line Items]	'	'
Sales percentage represented by major customers	10.00%	10.00%
Net Sales	'	'
Segment Reporting Information [Line Items]	'	'
Number of customers exceeding 10% threshold	0	0

Summary_of_Operating_Results_a

Summary of Operating Results and Certain Other Financial Data for Business Segments (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Net Sales	$207,828	$141,359	$649,802	$483,575
Segment operating profit (loss)	6,622	7,698	40,900	25,180
Corporate	-11,197	-10,339	-27,596	-30,967
Merger Charges	-2,863	0	-2,863	0
Interest	-17,409	-7,227	-52,203	-22,462
LOSS BEFORE INCOME TAXES FROM CONTINUING OPERATIONS	-24,847	-9,868	-41,762	-28,249
Depreciation, depletion and amortization	'	'	58,556	42,968
Capital expenditures	8,857	22,221	33,277	68,872
Cement Segment	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Segment operating profit (loss)	-1,614	9,849	16,073	24,328
Capital expenditures	5,713	13,803	22,128	54,588
Aggregates	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net Sales	20,325	16,641	64,009	60,638
Segment operating profit (loss)	3,386	2,111	15,363	9,629
Capital expenditures	963	927	3,644	3,528
Consumer Products	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net Sales	92,723	44,821	284,355	149,403
Segment operating profit (loss)	4,850	-4,262	9,464	-8,777
Capital expenditures	346	7,290	3,147	9,536
Intersegment Elimination	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net Sales	-28,470	-14,663	-87,016	-47,198
Corporate	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Capital expenditures	1,835	201	4,358	1,220
Cement	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net Sales	75,713	63,811	240,466	213,215
Other products	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net Sales	3,123	2,025	8,740	7,540
Delivery Fees	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net Sales	15,944	14,061	52,232	52,779
Segment, Continuing Operations	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Depreciation, depletion and amortization	19,094	14,096	58,556	41,956
Segment, Continuing Operations | Cement Segment	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Depreciation, depletion and amortization	13,017	8,395	39,137	25,288
Segment, Continuing Operations | Aggregates	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Depreciation, depletion and amortization	2,601	3,166	8,674	9,840
Segment, Continuing Operations | Consumer Products	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Depreciation, depletion and amortization	3,160	2,281	9,965	6,128
Segment, Continuing Operations | Corporate	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Depreciation, depletion and amortization	316	254	780	700
External Customers | Cement Segment	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	83,095	71,288	265,675	239,406
External Customers | Aggregates	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	31,094	25,439	98,857	94,738
External Customers | Consumer Products	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	93,639	44,632	285,270	149,431
Intersegment | Cement Segment	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	17,642	9,277	52,173	29,807
Intersegment | Aggregates	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	10,806	5,378	34,761	17,272
Intersegment | Consumer Products	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net sales	$22	$8	$82	$119

Summary_of_Asset_Used_in_Each_

Summary of Asset Used in Each of Business Segments (Detail) (USD $)	Feb. 28, 2014	31-May-13
In Thousands, unless otherwise specified
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Identifiable assets	$1,587,030	$1,635,825
Segment, Continuing Operations	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Identifiable assets	1,587,030	1,635,825
Segment, Continuing Operations | Cement Segment	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Identifiable assets	1,147,172	1,174,879
Segment, Continuing Operations | Aggregates	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Identifiable assets	159,580	168,255
Segment, Continuing Operations | Concrete	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Identifiable assets	187,901	182,839
Segment, Continuing Operations | Corporate	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Identifiable assets	$92,377	$109,852

Condensed_Consolidating_Financ2

Condensed Consolidating Financial Information - Additional Information (Detail) (USD $)	Feb. 28, 2014	31-May-13	Aug. 10, 2010	Aug. 10, 2010	Feb. 28, 2014
			9.25% Senior Notes	9.25% Senior Notes	9.25% Senior Notes
Condensed Consolidating Financial Information [Line Items]	'	'	'	'	'
Aggregate principal amount	$650,000,000	$650,000,000	$650,000,000	$650,000,000	'
Senior notes, interest rate	'	'	9.25%	9.25%	9.25%
Senior notes maturity date	'	'	'2020	'2020	'2020
Percentage of ownership in existing subsidiaries	100.00%	'	'	'	'

Condensed_Consolidating_Balanc

Condensed Consolidating Balance Sheet (Detail) (USD $)	Feb. 28, 2014	31-May-13	Feb. 28, 2013	31-May-12
In Thousands, unless otherwise specified
Supplemental Balance Sheet Information [Line Items]	'	'	'	'
Cash and cash equivalents	$47,833	$61,296	$31,664	$88,027
Receivables – net	126,811	126,922	'	'
Inventories	107,910	105,054	'	'
Deferred income taxes and prepaid expenses	20,057	27,294	'	'
TOTAL CURRENT ASSETS	302,611	320,566	'	'
Property, plant and equipment – net	1,192,855	1,226,396	'	'
Goodwill	40,072	40,575	'	'
Real estate and investments	31,780	29,471	'	'
Deferred other charges	19,712	18,817	'	'
Investment in subsidiaries	0	0	'	'
Long-term intercompany receivables	0	0	'	'
TOTAL ASSETS	1,587,030	1,635,825	'	'
Accounts payable	71,584	69,061	'	'
Accrued interest, compensation and other	43,237	62,336	'	'
Current portion of long-term debt	2,036	1,872	'	'
TOTAL CURRENT LIABILITIES	116,857	133,269	'	'
LONG-TERM DEBT	656,797	657,935	'	'
Long-term intercompany payables	0	0	'	'
DEFERRED INCOME TAXES AND OTHER CREDITS	81,288	91,157	'	'
Shareholders' equity	732,088	753,464	'	'
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,587,030	1,635,825	'	'
Parent Company	'	'	'	'
Supplemental Balance Sheet Information [Line Items]	'	'	'	'
Cash and cash equivalents	45,957	58,791	26,415	84,713
Receivables – net	563	0	'	'
Inventories	0	0	'	'
Deferred income taxes and prepaid expenses	927	615	'	'
TOTAL CURRENT ASSETS	47,447	59,406	'	'
Property, plant and equipment – net	0	0	'	'
Goodwill	0	0	'	'
Real estate and investments	1,624	1,080	'	'
Deferred other charges	208,438	210,838	'	'
Investment in subsidiaries	1,081,716	1,061,854	'	'
Long-term intercompany receivables	122,508	167,778	'	'
TOTAL ASSETS	1,461,733	1,500,956	'	'
Accounts payable	0	46	'	'
Accrued interest, compensation and other	8,526	26,416	'	'
Current portion of long-term debt	0	0	'	'
TOTAL CURRENT LIABILITIES	8,526	26,462	'	'
LONG-TERM DEBT	650,245	650,245	'	'
Long-term intercompany payables	18,737	18,743	'	'
DEFERRED INCOME TAXES AND OTHER CREDITS	52,137	52,042	'	'
Shareholders' equity	732,088	753,464	'	'
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,461,733	1,500,956	'	'
Guarantor Subsidiaries	'	'	'	'
Supplemental Balance Sheet Information [Line Items]	'	'	'	'
Cash and cash equivalents	1,876	2,505	5,249	3,314
Receivables – net	126,811	126,922	'	'
Inventories	107,910	105,054	'	'
Deferred income taxes and prepaid expenses	19,285	26,834	'	'
TOTAL CURRENT ASSETS	255,882	261,315	'	'
Property, plant and equipment – net	1,192,855	1,226,396	'	'
Goodwill	40,072	40,575	'	'
Real estate and investments	30,156	28,391	'	'
Deferred other charges	10,015	7,744	'	'
Investment in subsidiaries	0	0	'	'
Long-term intercompany receivables	18,725	18,743	'	'
TOTAL ASSETS	1,547,705	1,583,164	'	'
Accounts payable	72,147	69,015	'	'
Accrued interest, compensation and other	34,866	36,075	'	'
Current portion of long-term debt	2,036	1,872	'	'
TOTAL CURRENT LIABILITIES	109,049	106,962	'	'
LONG-TERM DEBT	6,552	7,690	'	'
Long-term intercompany payables	122,496	167,778	'	'
DEFERRED INCOME TAXES AND OTHER CREDITS	227,892	238,880	'	'
Shareholders' equity	1,081,716	1,061,854	'	'
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,547,705	1,583,164	'	'
Consolidation, Eliminations	'	'	'	'
Supplemental Balance Sheet Information [Line Items]	'	'	'	'
Cash and cash equivalents	0	0	0	0
Receivables – net	-563	0	'	'
Inventories	0	0	'	'
Deferred income taxes and prepaid expenses	-155	-155	'	'
TOTAL CURRENT ASSETS	-718	-155	'	'
Property, plant and equipment – net	0	0	'	'
Goodwill	0	0	'	'
Real estate and investments	0	0	'	'
Deferred other charges	-198,741	-199,765	'	'
Investment in subsidiaries	-1,081,716	-1,061,854	'	'
Long-term intercompany receivables	-141,233	-186,521	'	'
TOTAL ASSETS	-1,422,408	-1,448,295	'	'
Accounts payable	-563	0	'	'
Accrued interest, compensation and other	-155	-155	'	'
Current portion of long-term debt	0	0	'	'
TOTAL CURRENT LIABILITIES	-718	-155	'	'
LONG-TERM DEBT	0	0	'	'
Long-term intercompany payables	-141,233	-186,521	'	'
DEFERRED INCOME TAXES AND OTHER CREDITS	-198,741	-199,765	'	'
Shareholders' equity	-1,081,716	-1,061,854	'	'
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	($1,422,408)	($1,448,295)	'	'

Condensed_Consolidating_Statem

Condensed Consolidating Statement of Operations (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Schedule of Condensed Consolidating Statement of Operations [Line Items]	'	'	'	'
NET SALES	$207,828	$141,359	$649,802	$483,575
Cost of products sold	195,835	129,035	592,986	444,297
GROSS PROFIT	11,993	12,324	56,816	39,278
Selling, general and administrative	18,264	17,056	56,471	51,679
Merger Charges	2,863	0	2,863	0
Interest expense	17,409	7,227	52,203	22,462
Other income, net	-1,696	-2,091	-12,959	-6,614
Intercompany other income	0	0	0	0
LOSS BEFORE INCOME TAXES FROM CONTINUING OPERATIONS	-24,847	-9,868	-41,762	-28,249
Income taxes (benefit)	-3,078	-1,355	-2,783	-2,151
Equity in earnings of subsidiaries	0	0	0	0
NET LOSS FROM CONTINUING OPERATIONS	-21,769	-8,513	-38,979	-26,098
Net income from discontinued operations	0	2,699	0	6,504
Net income (loss)	-21,769	-5,814	-38,979	-19,594
Comprehensive loss	-18,612	-5,718	-35,802	-19,033
Parent Company	'	'	'	'
Schedule of Condensed Consolidating Statement of Operations [Line Items]	'	'	'	'
NET SALES	0	0	0	0
Cost of products sold	0	0	0	0
GROSS PROFIT	0	0	0	0
Selling, general and administrative	4,184	2,762	8,643	7,446
Merger Charges	2,863	'	2,863	'
Interest expense	17,304	17,309	51,877	51,545
Other income, net	-12	-13	-70	-62
Intercompany other income	-863	-863	-2,618	-2,618
LOSS BEFORE INCOME TAXES FROM CONTINUING OPERATIONS	-23,476	-19,195	-60,695	-56,311
Income taxes (benefit)	-1,654	517	-2,169	441
Equity in earnings of subsidiaries	53	13,898	19,547	37,159
NET LOSS FROM CONTINUING OPERATIONS	-21,769	-5,814	-38,979	-19,593
Net income from discontinued operations	0	0	0	0
Net income (loss)	-21,769	-5,814	-38,979	-19,593
Comprehensive loss	-21,769	-5,814	-38,979	-19,593
Guarantor Subsidiaries	'	'	'	'
Schedule of Condensed Consolidating Statement of Operations [Line Items]	'	'	'	'
NET SALES	207,828	141,359	649,802	483,575
Cost of products sold	195,835	129,035	592,986	444,297
GROSS PROFIT	11,993	12,324	56,816	39,278
Selling, general and administrative	14,080	14,294	47,828	44,233
Merger Charges	0	'	0	'
Interest expense	0	0	0	0
Other income, net	-1,684	-2,078	-12,889	-6,552
Intercompany other income	968	-9,219	2,944	-26,465
LOSS BEFORE INCOME TAXES FROM CONTINUING OPERATIONS	-1,371	9,327	18,933	28,062
Income taxes (benefit)	-1,424	-1,872	-614	-2,592
NET LOSS FROM CONTINUING OPERATIONS	53	11,199	19,547	30,654
Net income from discontinued operations	0	2,699	0	6,504
Net income (loss)	53	13,898	19,547	37,158
Comprehensive loss	3,210	13,994	22,724	37,719
Consolidation, Eliminations	'	'	'	'
Schedule of Condensed Consolidating Statement of Operations [Line Items]	'	'	'	'
NET SALES	0	0	0	0
Cost of products sold	0	0	0	0
GROSS PROFIT	0	0	0	0
Selling, general and administrative	0	0	0	0
Merger Charges	0	'	0	'
Interest expense	105	-10,082	326	-29,083
Other income, net	0	0	0	0
Intercompany other income	-105	10,082	-326	29,083
LOSS BEFORE INCOME TAXES FROM CONTINUING OPERATIONS	0	0	0	0
Income taxes (benefit)	0	0	0	0
Equity in earnings of subsidiaries	-53	-13,898	-19,547	-37,159
NET LOSS FROM CONTINUING OPERATIONS	-53	-13,898	-19,547	-37,159
Net income from discontinued operations	0	0	0	0
Net income (loss)	-53	-13,898	-19,547	-37,159
Comprehensive loss	($53)	($13,898)	($19,547)	($37,159)

Condensed_Consolidating_Statem1

Condensed Consolidating Statement of Cash Flows (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013
Cash Flow Supplemental Disclosures [Line Items]	'	'
Net cash provided (used) by operating activities	($665)	$9,771
Capital expenditures – expansions	-7,125	-61,344
Capital expenditures – other	-26,152	-17,752
Proceeds from asset disposals	8,390	5,783
Proceeds from insurance contracts, net of premiums paid	4,386	2,366
Other – net	0	-67
Net cash provided (used) by investing activities	-20,501	-71,014
Debt payments	-1,373	-2,236
Stock option exercises	9,076	7,116
Net intercompany financing activities	0	0
Net cash used by financing activities	7,703	4,880
Decrease in cash and cash equivalents	-13,463	-56,363
Cash and cash equivalents at beginning of period	61,296	88,027
Cash and cash equivalents at end of period	47,833	31,664
Parent Company	'	'
Cash Flow Supplemental Disclosures [Line Items]	'	'
Net cash provided (used) by operating activities	-71,557	-88,158
Capital expenditures – expansions	0	0
Capital expenditures – other	0	0
Proceeds from asset disposals	0	0
Proceeds from insurance contracts, net of premiums paid	4,386	2,366
Other – net	'	0
Net cash provided (used) by investing activities	4,386	2,366
Debt payments	0	-4
Stock option exercises	9,076	7,116
Net intercompany financing activities	45,261	20,382
Net cash used by financing activities	54,337	27,494
Decrease in cash and cash equivalents	-12,834	-58,298
Cash and cash equivalents at beginning of period	58,791	84,713
Cash and cash equivalents at end of period	45,957	26,415
Guarantor Subsidiaries	'	'
Cash Flow Supplemental Disclosures [Line Items]	'	'
Net cash provided (used) by operating activities	70,892	97,929
Capital expenditures – expansions	-7,125	-61,344
Capital expenditures – other	-26,152	-17,752
Proceeds from asset disposals	8,390	5,783
Proceeds from insurance contracts, net of premiums paid	0	0
Other – net	'	-67
Net cash provided (used) by investing activities	-24,887	-73,380
Debt payments	-1,373	-2,232
Stock option exercises	0	0
Net intercompany financing activities	-45,261	-20,382
Net cash used by financing activities	-46,634	-22,614
Decrease in cash and cash equivalents	-629	1,935
Cash and cash equivalents at beginning of period	2,505	3,314
Cash and cash equivalents at end of period	1,876	5,249
Consolidation, Eliminations	'	'
Cash Flow Supplemental Disclosures [Line Items]	'	'
Net cash provided (used) by operating activities	0	0
Capital expenditures – expansions	0	0
Capital expenditures – other	0	0
Proceeds from asset disposals	0	0
Proceeds from insurance contracts, net of premiums paid	0	0
Other – net	'	0
Net cash provided (used) by investing activities	0	0
Debt payments	0	0
Stock option exercises	0	0
Net intercompany financing activities	0	0
Net cash used by financing activities	0	0
Decrease in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$0	$0