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Property and Equipment, stated at cost (in thousands)
9 Months Ended
Sep. 30, 2011
Property, Plant and Equipment [Abstract] 
Property and Equipment, stated at cost (in thousands)
4.  
Property and Equipment, stated at cost (in thousands):

 
September 30, 2011
   
December 31, 2010
 
Construction equipment
$
124,227
   
$
109,432
 
Transportation equipment
 
17,950
     
14,915
 
Buildings
 
4,730
     
4,673
 
Office equipment
 
1,053
     
870
 
Construction in progress
 
1,776
     
870
 
Land
 
2,916
     
2,916
 
Water rights
 
200
     
200
 
   
152,852
     
133,876
 
Less accumulated depreciation
 
(69,133
)
   
(59,195
)
 
$
83,719
   
$
74,681
 

Construction in progress at September 30, 2011 and December 31, 2010 consists primarily of expenditures for new maintenance shop facilities and offices at various locations in Texas.