ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Summary of Amounts Reclassified Out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassifications out of accumulated other comprehensive income (loss)
Provision for income taxes									$ (24,001)	$ (62,960)	$ (9,570)
Net income (loss)	$ 25,881	$ 156,212	$ 50,585	$ (105,959)	$ 31,929	$ 45,615	$ (14,733)	$ (86,331)	126,719	(23,520)	$ (73,695)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of accumulated other comprehensive income (loss)
Provision for income taxes									(1,052)	(307)
Net income (loss)									1,745	2,195
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges | Interest Rate Swap | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of accumulated other comprehensive income (loss)
Interest expense									$ 2,797	$ 2,502