INCOME TAXES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Gross deferred tax assets	$ 410,513	$ 412,155
Valuation allowance	(390,138)	(393,034)
Deferred tax assets, net of valuation allowance	20,375	19,121
Deferred tax liabilities	27,515	26,261
Net deferred tax liabilities	$ (7,140)	$ (7,140)