ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Reclassifications out of accumulated other comprehensive income (loss)
Provision for income taxes	$ (13,361)	$ (1,301)	$ (15,840)	$ (5,085)
Net income (loss)	(76,496)	34,992	(99,666)	(76,532)
Gains and losses on cash flow hedges | Interest rate swap contracts | Amounts reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassifications out of accumulated other comprehensive income (loss)
Interest (expense)	(458)		(907)
Provision for income taxes	(70)		(140)
Net income (loss)	$ (528)		$ (1,047)