INCOME TAXES (Reconciliation of Income Tax Computed by Applying Statutory Federal Income Tax Rate) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation
Federal income tax at 35% of earnings before income taxes and discontinued operations	$ (390,423)	$ 65,947	$ 105,472
State income taxes, net of federal income tax benefits	(11,211)	2,214	3,526
Change in valuation allowance	575,570	0	0
Canadian dividend tax, net of U.S. tax benefit	0	18,460	0
Effect of federal, state, and foreign tax on permanent differences	3,026	4,025	4,030
Other	(3,525)	(1,511)	(3,258)
Total income tax	$ 173,437	$ 89,135	$ 109,770
Federal income tax rate percentage (as a percent)	35.00%	35.00%	35.00%