ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reclassifications out of accumulated other comprehensive income (loss)
Provision for income taxes									$ (9,570)	$ (6,887)	$ 18,325
Net income (loss)	18,538	7,433	(76,496)	(23,170)	(821)	(50,192)	34,992	(111,522)	(73,695)	(127,543)	148,470
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)									(967)
Provision for income taxes									(269)
Net income (loss)									$ (1,236)