Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details Textual)

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Commitments and Contingencies (Details Textual) (USD $)
7 Months Ended 12 Months Ended
Jul. 31, 2009
Dec. 31, 2011
acre
Death
Property
Customer
Lawsuit
Insurer
Dec. 31, 2010
Customer
Dec. 31, 2009
Customer
Jul. 31, 2009
Jun. 16, 2011
Insurer
Jun. 06, 2011
Insurer
Apr. 15, 2011
Insurer
Commitments and Contingencies (Textual) [Abstract]                
Rent expense related to operating leases   $ 118,800,000 $ 109,400,000 $ 112,200,000        
Maximum guaranteed residual value   126,000,000            
Estimated committed capital expenditures for 2012   14,100,000            
Number of lawsuits related to California wildfire litigation   4            
Amount of acreage damaged due to wildfire   198,000            
Number of homes and structures damaged due to wildfire   1,500            
Alleged deaths caused by wildfire   2            
Alleged number of personal injuries caused by wildfire   Numerous            
Land damaged due to wildfire, in acres   16,800            
Number of Insurers Claiming Coverage does not exist           1 1 1
Number of Insurers Participating Under a Reservation of Rights   2            
Payment of fire suppression costs   8,500,000            
Other damages   51,300,000            
Number of customers representing ten percent or more of accounts receivables   0 1          
Minimum percentage of billed and unbilled accounts receivable   10% or more 10% or more          
Number of customers representing ten percent or more of consolidated revenues   0 1 0        
Minimum percentage of revenue   10% or more 10% or more 10% or more        
Percentage of billed and accrued receivables for significant customer     12.00%          
Percent of consolidated revenues for one major customer     11.00%          
General liability insurance claims deductible   5,000,000 5,000,000   3,000,000      
Auto liability insurance claims deductible   5,000,000 5,000,000   3,000,000      
Worker's compensation insurance claims deductible   5,000,000 5,000,000   2,000,000      
Employer's liability insurance claims deductible   1,000,000 1,000,000   1,000,000      
Employee health care benefit plans subject to deductible per claimant   350,000 350,000 350,000        
Maximum worker's compensation claims subject to annual cumulative aggregate liability on claims in excess of $2.0 million per occurrence 1,000,000              
Gross amount accrued for insurance claims   201,200,000 216,800,000          
Long-term insurance claims   155,400,000 164,300,000          
Related insurance recoveries receivables   63,100,000 66,300,000          
Related insurance recoveries/receivables included in prepaid expenses and other current assets   9,800,000 9,400,000          
Related insurance recoveries receivables included in other assets net   53,300,000 56,900,000          
Letters of credit outstanding issued under credit facility   191,400,000            
Total amount of outstanding performance bonds   2,180,000,000            
Estimated cost to complete bonded projects   722,500,000            
Partial withdrawal liability   32,600,000            
California Wildfire San Diego [Member]
               
Commitments and Contingencies (Textual) [Abstract]                
Liability recorded for fire claims   35,000,000            
Insurance recovery receivable   35,000,000            
California Wildfire Amador County [Member]
               
Commitments and Contingencies (Textual) [Abstract]                
Liability recorded for fire claims   8,500,000            
Insurance recovery receivable   $ 8,500,000