RESTRICTED INVESTMENTS AND BOND COLLATERAL - Additional Information (Details) (Available For Sale Securities Held As Restricted Investments And Bond Collateral [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Available For Sale Securities Held As Restricted Investments And Bond Collateral [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gain (Loss)	$ 0.1