INCOME TAXES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
INCOME TAXES
Period of cumulative book loss that limits ability to consider other subjective evidence for growth			3 years
Income tax expense or benefit	$ 1,295	$ 360,283	$ 1,295	$ 333,868
Pre-tax income (loss)	$ 196,340	$ (1,215,110)	$ 55,899	$ (1,146,142)
Effective income tax rate (as a percent)			(2.30%)	29.10%