Restructuring (Details) (USD $)	3 Months Ended	12 Months Ended				3 Months Ended	12 Months Ended								12 Months Ended								12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Quarry property [Member]	Dec. 31, 2013 Quarry property [Member] Restructuring Type, Non-performing Quarry Sites [Member]	Dec. 31, 2013 Quarry property [Member] Restructuring Type, Non-performing Quarry Sites [Member]	Dec. 31, 2013 Enterprise Improvement Plan [Member]	Dec. 31, 2012 Enterprise Improvement Plan [Member]	Dec. 31, 2011 Enterprise Improvement Plan [Member]	Dec. 31, 2010 Enterprise Improvement Plan [Member]	Dec. 31, 2012 Enterprise Improvement Plan [Member] Restructuring Type, Real Estate Asset Impairment [Member]	Dec. 31, 2011 Enterprise Improvement Plan [Member] Restructuring Type, Real Estate Asset Impairment [Member]	Dec. 31, 2013 Enterprise Improvement Plan [Member] Restructuring Type, Real Estate Asset Impairment [Member]	Dec. 31, 2013 Enterprise Improvement Plan [Member] Workforce Reduction Severance [Member]	Dec. 31, 2012 Enterprise Improvement Plan [Member] Workforce Reduction Severance [Member]	Dec. 31, 2011 Enterprise Improvement Plan [Member] Workforce Reduction Severance [Member]	Dec. 31, 2012 Enterprise Improvement Plan [Member] Contract Termination [Member]	Dec. 31, 2011 Enterprise Improvement Plan [Member] Contract Termination [Member]	Dec. 31, 2012 Enterprise Improvement Plan [Member] Quarry property [Member] Restructuring Type, Non-performing Quarry Sites [Member]	Dec. 31, 2011 Enterprise Improvement Plan [Member] Quarry property [Member] Restructuring Type, Non-performing Quarry Sites [Member]	Dec. 31, 2013 Enterprise Improvement Plan [Member] Quarry property [Member] Restructuring Type, Non-performing Quarry Sites [Member]	Dec. 31, 2010 Noncontrolling Interest [Member] Enterprise Improvement Plan [Member]	Dec. 31, 2010 Real Estate Segment [Member] Enterprise Improvement Plan [Member]	Dec. 31, 2013 Real Estate Segment [Member] Enterprise Improvement Plan [Member] Restructuring Type, Real Estate Asset Impairment [Member]	Dec. 31, 2013 Real Estate Segment [Member] Noncontrolling Interest [Member] Enterprise Improvement Plan [Member] Restructuring Type, Real Estate Asset Impairment [Member]	Dec. 31, 2010 Construction Materials [Member] Enterprise Improvement Plan [Member]	Dec. 31, 2013 Construction Materials [Member] Enterprise Improvement Plan [Member] Contract Termination [Member]	Dec. 31, 2013 Construction Materials [Member] Enterprise Improvement Plan [Member] Quarry property [Member] Restructuring Type, Non-performing Quarry Sites [Member]
Restructuring Charges [Abstract]
Restructuring (gain) charges								$ 48,975,000	$ (3,728,000)	$ 2,181,000	$ 109,300,000	$ (3,093,000)	$ 1,452,000		$ 0	$ 0	$ 471,000	$ (635,000)	$ 32,000	$ 0	$ 226,000		$ 20,000,000	$ 86,300,000	$ 31,090,000	$ 3,900,000	$ 10,300,000	$ 3,234,000	$ 14,651,000
Real estate held for development and sale	12,478,000	12,478,000	50,223,000			4,200,000	4,200,000							44,600,000								17,100,000							21,300,000
Restructuring liabilities	4,600,000	4,600,000	1,500,000
Asset Impairment Charges	3,200,000	3,164,000	0	0	17,800,000	3,200,000	3,200,000
Restructuring, Settlement and Impairment Provisions		$ 52,139,000	$ (3,728,000)	$ 2,181,000