INCOME TAXES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Gross deferred tax assets	$ 411,344	$ 405,266
Valuation allowance	(381,906)	(376,224)
Deferred tax assets, net of valuation allowance	29,438	29,042
Deferred tax liabilities	36,871	36,182
Net deferred tax liabilities	$ (7,433)	$ (7,140)