ACQUISITIONS AND DIVESTITURES (Schedule Of Business Acquisitions) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2014
Significant Acquisitions And Disposals [Line Items]
Goodwill		$ 13,303	[1]
Common stock issued in connection with business acquisitions	60,855	715,004
Series of Individually Immaterial Business Acquisitions [Member]
Significant Acquisitions And Disposals [Line Items]
Cash		284,237
Exchanges of real property and businesses		2,414
Vulcan Materials Company, common stock		45,185
Total fair value of purchase consideration		331,836
Accounts and notes receivable, net		9,406
Inventories		13,229
Other current assets		203
Property, plant & equipment, net		194,031
Contractual rights in place		126,036
Noncompetition agreement		2,250
Deferred income taxes, net		(14,058)
Liabilities assumed		(12,564)
Net identifiable assets acquired		318,533
Goodwill		$ 13,303
Common stock issued in connection with business acquisitions		715,004

[1] Refer to Note 19 for additional details.