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Goodwill and Intangible Assets
6 Months Ended
Jun. 30, 2011
Goodwill and Intangible Assets [Abstract]  
Goodwill and Intangible Assets
 
(6)
Goodwill and Intangible Assets

There were no changes in the carrying amount of Goodwill and Intangible Assets during the six months ended June 30, 2011, except in connection with the acquisitions of Fisk, Anderson and Frontier (see Note 3), as shown in the tables below (in thousands):
 
   
Building
  
Civil
  
Management Services
  
Total
 
              
Gross Goodwill
 $402,926  $319,254  $66,638  $788,818 
Accumulated impairment
  (146,847)  -   (20,051)  (166,898)
Balance at December 31, 2010
  256,079   319,254   46,587   621,920 
Goodwill recorded in connection with the acquisitions of Fisk, Anderson and Frontier-Kemper
  63,309   5,848   -   69,157 
Balance at June 30, 2011
 $319,388  $325,102  $46,587  $691,077 

Intangible Assets consist of the following (in thousands):

   
As of June 30, 2011
 
   
Gross Carrying Amount
  
Accumulated Amortization
  
Carrying Value
 
Trade names
 $123,350  $-  $123,350 
Contractor license
  5,320   -   5,320 
Customer relationships
  36,600   (8,771)  27,829 
Construction contract backlog
  39,140   (35,433)  3,707 
Total
 $204,410  $(44,204) $160,206 

   
As of December 31, 2010
 
   
Gross Carrying Amount
  
Accumulated Amortization
  
Carrying Value
 
Trade names
 $101,250  $-  $101,250 
Contractor license
  5,320   -   5,320 
Customer relationships
  31,700   (7,113)  24,587 
Construction contract backlog
  34,540   (33,146)  1,394 
Total
 $172,810  $(40,259) $132,551 

Amortization expense for the three and six month periods ended June 30, 2011 was $2.2 million and $3.9 million, respectively.  Amortization expense for the three and six month periods ended June 30, 2010 was $2.0 million and $4.3 million, respectively.  As of June 30, 2011, amortization expense is estimated to be $3.7 million for the remainder of 2011, $5.0 million in 2012, $3.3 million in 2013 and 2014, $2.7 million in 2015 and $13.5 million thereafter.