Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,199,013	$ 1,203,104	$ 1,215,551
Accumulated depreciation and depletion	813,977	793,451	791,279
Property and equipment, net	385,036	409,653	424,272
Equipment and vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	762,121	767,313	771,934
Quarry property [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	171,924	172,081	169,982
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	111,058	110,235	118,985
Building and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	82,651	82,655	83,813
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 71,259	$ 70,820	$ 70,837