Property and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,214,718	$ 1,209,980	$ 1,218,640
Accumulated depreciation and depletion	788,018	773,121	747,747
Property and equipment, net	426,700	436,859	470,893
Equipment and vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	769,271	765,971	760,271
Quarry property [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	170,279	170,442	180,325
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	120,982	119,917	125,489
Building and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	83,994	83,494	83,733
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 70,192	$ 70,156	$ 68,822