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Property and Equipment, Net
6 Months Ended
Jun. 30, 2013
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net
Property and Equipment, net
 
Balances of major classes of assets and allowances for depreciation and depletion are included in property and equipment, net on our condensed consolidated balance sheets as follows:
(in thousands)
 
June 30,
2013
 
December 31,
2012
 
June 30,
2012
Equipment and vehicles
 
$
760,271

 
$
758,782

 
$
722,724

Quarry property
 
180,325

 
180,567

 
177,792

Land and land improvements
 
125,489

 
125,961

 
126,396

Buildings and leasehold improvements
 
83,733

 
83,245

 
80,910

Office furniture and equipment
 
68,822

 
67,743

 
63,414

Property and equipment
 
1,218,640

 
1,216,298

 
1,171,236

Less: accumulated depreciation and depletion
 
747,375

 
734,820

 
731,572

Property and equipment, net
 
$
471,265

 
$
481,478

 
$
439,664