LINES OF CREDIT - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Line of Credit Facility [Line Items]
Line of credit, amount outstanding	$ 0
Compensating balance requirments for our letters of credit	11,000,000
Real Estate
Line of Credit Facility [Line Items]
Line of credit, amount available	50,000,000
Revolving credit facility, new
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	1,000,000,000
Line of credit, expiration date	Sep. 30, 2018
Revolving credit facility, old
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	$ 1,000,000,000
Line of credit, expiration date	Jun. 30, 2015