ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement Of Income And Comprehensive Income Abstract
Accumulated other comprehensive income (loss) beginning balance	$ 0	$ (7,277)	$ (13,432)
Derivative Instrument and Hedging Activities [Line Items]
Net (gain) loss on derivative instruments	0	5,643	6,155
Income (taxes) benefit	0	(2,149)	(2,431)
Net gain (loss) on derivatives, net of taxes and before valuation allowance	0	9,492	3,724
Valuation allowance - (decrease) increase	0	0	(2,431)
Net gain (loss), net of taxes	0	9,492	6,155
Reclassification to the income statement due to hedge ineffectiveness	0	(2,215)	0
Net activity	0	7,277	6,155
Prior period correction recorded in the current period	0	5,998	0
Accumulated other comprehensive income (loss) ending balance	$ 0	$ 0	$ (7,277)