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LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Details 3) (USD $)
 9 Months Ended 0 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2013
Accounts receivable securitization program
Sep. 30, 2013
Letter of Credit Agreements
Sep. 30, 2013
Surety bonds
Sep. 30, 2013
Credit Agreement
Sep. 30, 2013
Revolving commitments
Jun. 15, 2012
Term Loan
Financing Arrangements                
Debt instrument, term               5 years
Face amount of term loan               $ 100,000,000
Maximum borrowing capacity     75,000,000       75,000,000  
Amount borrowed     0       0  
Fixed charge coverage ratio           1.8    
Minimum fixed charge coverage ratio required to be maintained           1.25    
Outstanding letters of credit     20,500,000 23,000,000        
Remaining borrowing capacity     54,500,000 73,100,000        
Amounts collateralized by restricted funds under letters of credit 1,902,000 9,658,000   1,900,000        
Outstanding surety bonds under collateralized bond program         12,700,000      
Amounts collateralized by letters of credit         3,800,000      
Outstanding surety bonds under uncollateralized bond programs         $ 43,900,000