ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Summary of Amounts Reclassified Out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reclassifications out of accumulated other comprehensive income (loss)
Provision for income taxes									$ (118,450)	$ (24,001)	$ (62,960)
Net income (loss)	$ 43,595	$ 7,996	$ 6,970	$ 143,765	$ 25,881	$ 156,212	$ 50,585	$ (105,959)	202,326	126,719	$ (23,520)
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)
Interest expense									2,175	2,797
Net income (loss)									1,364	1,745
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)
Provision for income taxes									$ (811)	$ (1,052)