Summary of Estimated Fair values of Assets Acquired and Liabilities Assumed (Detail) (Texas Industries Inc., USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jul. 01, 2014
Texas Industries Inc.
Assets:
Cash and cash equivalents	$ 59,887
Receivables	161,437
Inventory	132,972
Other current assets	56,246
Property, plant and equipment	1,608,305
Real estate and other investments	59,584
Intangible assets, other than goodwill	559,327
Other noncurrent assets	5,367
Goodwill	1,457,043
Total assets	4,100,168
Liabilities:
Accounts payable and accrued expenses	259,723
Notes and contracts payable and capital leases	745,217
Deferred income tax liabilities	338,294
Total liabilities	1,343,234
Total consideration	$ 2,756,934	$ 2,756,934