TERM LOAN (Details) (Term loan, USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
TERM LOAN
Principal value	$ 225,000
Original issue discount together with issuance costs	$ 10,965
Percentage of principal repayment	1.25%
Interest rate (as a percent)	6.25%
Base rate
TERM LOAN
Variable rate basis	Base Rate
Margin on variable rate basis (as a percent)	4.00%
LIBOR
TERM LOAN
Variable rate basis	LIBOR
Margin on variable rate basis (as a percent)	5.00%