Property and Equipment, Net (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,216,298,000	$ 1,216,298,000	$ 1,169,828,000
Less: accumulated depreciation and depletion	734,820,000	734,820,000	722,688,000
Property and equipment, net	481,478,000	481,478,000	447,140,000
Depreciation and Depletion		51,800,000	56,000,000	64,900,000
Interest Costs, Capitalized During Period		2,300,000	7,400,000	8,100,000
Gain (Loss) on Disposition of Property	18,000,000	27,447,000	15,789,000	13,748,000
Real Estate Held for Development and Sale [Member]
Property, Plant and Equipment [Line Items]
Interest Costs, Capitalized During Period		2,100,000	6,300,000	7,800,000
Property, Plant And Equipment Net [Member]
Property, Plant and Equipment [Line Items]
Interest Costs, Capitalized During Period		200,000	1,100,000	300,000
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	125,961,000	125,961,000	124,216,000
Quarry property [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	180,567,000	180,567,000	175,612,000
Building and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	83,245,000	83,245,000	81,272,000
Equipment and vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	758,782,000	758,782,000	733,158,000
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 67,743,000	$ 67,743,000	$ 55,570,000