DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS, Subsequent Settlements (Details) - Prepaid forward contracts - Designated as Hedging Instruments - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2016	Mar. 31, 2016
Derivative [Line Items]
Reclassification of investment securities pledged as collateral from current assets to long-term assets		$ 166,882
Reclassification of collateralized indebtedness from current liabilities to long-term liabilities		$ 133,691
Subsequent Event
Derivative [Line Items]
Number of shares monetized	2,732,184