Goodwill (Tables)

3 Months Ended

Mar. 31, 2012

Goodwill [Abstract]

Changes in the carrying amount of goodwill by reportable segment

GOODWILL in thousands	Aggregates		Concrete		Asphalt Mix		Cement		Total
Gross Carrying Amount
Total as of December 31, 2011		$2,995,083		$0		$91,633		$252,664		$3,339,380
Total as of March 31, 2012		$2,995,083		$0		$91,633		$252,664		$3,339,380
Accumulated Impairment Losses
Total as of December 31, 2011		$0		$0		$0		($252,664)		($252,664)
Total as of March 31, 2012		$0		$0		$0		($252,664)		($252,664)
Goodwill, net of Accumulated Impairment Losses
Total as of December 31, 2011		$2,995,083		$0		$91,633		$0		$3,086,716
Total as of March 31, 2012		$2,995,083		$0		$91,633		$0		$3,086,716