DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS, Impact and Location of Derivative Instruments within Consolidated Statements of Income (Details) (Prepaid forward contracts, Gain on Equity Derivative Contracts, Net, Derivatives Not Designated as Hedging Instruments, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Prepaid forward contracts | Gain on Equity Derivative Contracts, Net | Derivatives Not Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) Recognized in Income [Abstract]
Amount of gain recognized	$ 46,166	$ 38,649