Property and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,201,862us-gaap_PropertyPlantAndEquipmentGross	$ 1,203,104us-gaap_PropertyPlantAndEquipmentGross	$ 1,215,620us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation and depletion	801,952	793,451	783,222
Property and equipment, net	399,910us-gaap_PropertyPlantAndEquipmentNet	409,653us-gaap_PropertyPlantAndEquipmentNet	432,398us-gaap_PropertyPlantAndEquipmentNet
Equipment and vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	766,066	767,313	770,266
Quarry property [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	172,046	172,081	170,442
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	110,302	110,235	120,092
Building and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	82,628	82,655	83,994
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 70,820	$ 70,820	$ 70,826

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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