Goodwill And Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill And Intangible Assets [Abstract]

Changes In Goodwill

years ended December 31	Mideast Group		Southeast Group			West Group		Total
(add 000)	2011
Balance at beginning of period	$	122,052	$	105,870		$	398,605	$	626,527
Acquisitions		---		---			23,941		23,941
Amounts allocated to divestitures		---		(33,797	)		---		(33,797)
Balance at end of period	$	122,052	$	72,073		$	422,546	$	616,671
	2010
Balance at beginning of period	$	119,749	$	105,870		$	398,605	$	624,224
Acquisitions		2,303		---			---		2,303
Balance at end of period	$	122,052	$	105,870		$	398,605	$	626,527

Schedule Of Intangible Assets Subject To Amortization

December 31	Gross Amount		Accumulated Amortization			Net Balance
(add 000)	2011
Noncompetition agreements	$	6,984	$	(5,447	)	$	1,537
Customer relationships		20,160		(2,070	)		18,090
Use rights and other		15,865		(5,307	)		10,558
Total	$	43,009	$	(12,824	)	$	30,185
	2010
Noncompetition agreements	$	9,850	$	(7,485	)	$	2,365
Customer relationships		3,550		(1,347	)		2,203
Use rights and other		9,105		(5,490	)		3,615
Total	$	22,505	$	(14,322	)	$	8,183

Schedule Intangible Assets Deemed To Indefinite Life And Not Being Amortized

December 31	Aggregates Business		Specialty Products		Total
(add 000)	2011
Use rights	$	21,383	$	--	$	21,383
Trade name		--		2,565		2,565
Total	$	21,383	$	2,565	$	23,948
	2010
Use rights	$	6,800	$	--	$	6,800
Trade name		--		2,565		2,565
Total	$	6,800	$	2,565	$	9,365

Schedule Of Acquired Other Intangibles

	Amount		Weighted-average amortization period
(add 000)	2011
Subject to amortization:
Noncompetition agreements	$	180	7.0 years
Customer relationships		16,610	11.6 years
Use rights and other		7,410	19.5 years
		24,200	14.0 years
Not subject to amortization:
Use rights		14,583	N/A
Total	$	38,783
	2010
Subject to amortization:
Noncompetition agreements	$	566	9.2 years
Not subject to amortization:
Use rights		6,600	N/A
Total	$	7,166

Schedule Of Estimated Amortization Expense Of Intangible Assets

(add 000)
2012	$	3,623
2013		3,539
2014		3,245
2015		2,606
2016		2,370
Thereafter		14,802
Total	$	30,185