FAIR VALUE MEASUREMENT, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Sep. 30, 2014 Fair Value Measured on a Recurring Basis [Member]	Dec. 31, 2013 Fair Value Measured on a Recurring Basis [Member]	Sep. 30, 2014 Fair Value Measured on a Recurring Basis [Member] Level I [Member]	Dec. 31, 2013 Fair Value Measured on a Recurring Basis [Member] Level I [Member]	Sep. 30, 2014 Fair Value Measured on a Recurring Basis [Member] Level II [Member]	Dec. 31, 2013 Fair Value Measured on a Recurring Basis [Member] Level II [Member]	Sep. 30, 2014 Fair Value Measured on a Recurring Basis [Member] Level III [Member]	Dec. 31, 2013 Fair Value Measured on a Recurring Basis [Member] Level III [Member]
Assets [Abstract]
Money market funds		$ 697,307	$ 608,225	$ 697,307	$ 608,225	$ 0	$ 0	$ 0	$ 0
Investment securities		141	138	141	138	0	0	0	0
Investment securities pledged as collateral		1,155,066	1,116,084	1,155,066	1,116,084	0	0	0	0
Prepaid forward contracts		20,454	3,385	0	0	20,454	3,385	0	0
Liabilities under derivative contracts [Abstract]
Prepaid forward contracts		50,584	146,947	0	0	50,584	146,947	0	0
Impairment charges for goodwill, indefinite-lived cable television franchises, trademarks and other indefinite-lived intangible assets	$ 0