Quarterly report pursuant to Section 13 or 15(d)

DEBT AND CREDIT FACILITIES (Narrative) (Details)

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DEBT AND CREDIT FACILITIES (Narrative) (Details)
 3 Months Ended 3 Months Ended
Mar. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Mar. 31, 2014
Revolving Credit Facility [Member]
USD ($)
Dec. 31, 2013
Revolving Credit Facility [Member]
USD ($)
Mar. 31, 2014
Line of Credit [Member]
USD ($)
Mar. 31, 2014
Line of Credit [Member]
AUD
Dec. 31, 2013
Line of Credit [Member]
USD ($)
Dec. 31, 2013
Line of Credit [Member]
AUD
Mar. 31, 2014
Letter of Credit [Member]
USD ($)
Mar. 31, 2014
Line of Credit [Member]
USD ($)
Line of Credit Facility [Line Items]                    
Revolving credit facility, borrowing capacity         $ 27,800,000 30,000,000 $ 26,800,000 30,000,000    
Financial covenant, debt to earnings ratio     3.5              
Financial covenant, interest coverage ratio     2.50              
Credit facility, amount outstanding     175,000,000 [1] 0 [1] 21,300,000 23,000,000 20,500,000 23,000,000    
Credit facility remaining capacity     1,600,000,000 1,700,000,000 6,500,000 7,000,000 6,300,000 7,000,000    
Short-term Debt                 25,700,000 50,000,000
Minimum Number of Days Loan Can be Drawn 30                  
Maximum Number of Days Loan can be Drawn 90                  
Letters of credit outstanding $ 47,300,000 $ 48,000,000 $ 5,200,000 $ 8,400,000            
[1] As of March 31, 2014, $175.0 million of revolving loans were drawn under the credit facility. As of December 31, 2013, no revolving loans were drawn under the credit facility. As of March 31, 2014 and December 31, 2013, the principal amount of letter of credit obligations totaled $5.2 million and $8.4 million, respectively, thereby reducing available borrowing capacity to $1.6 billion and $1.7 billion for each period, respectively.