INCOME TAXES (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating Loss and Other Tax Carryforwards
Increase (decrease) in valuation allowance	$ (14,000)	$ 69,000	$ (183,272,000)
Deferred Tax Assets (Liabilities), Net Classification
Deferred tax asset, net of valuation allowance recorded	147,800,000	222,000,000
Short-term deferred tax asset	36,755,000	70,559,000
Long-term deferred tax asset	111,080,000	151,408,000
Deferred income taxes	46,990,000	56,440,000
U.S. Federal Income Tax
Operating Loss and Other Tax Carryforwards
Net operating loss carryforwards	2,600,000,000
Maximum change in ownership percentage allowed before statutory limitations imposed on the availability of net operating losses (as a percent)	50.00%
Estimated aggregate limitation of cumulative net operating losses available net of limit imposed by IRC Section 382	1,200,000,000
U.S. Federal Income Tax | Operating Losses
Operating Loss and Other Tax Carryforwards
Net operating loss carryforwards	400,000,000
U.S. Federal Income Tax | Equity-Related Transactions
Operating Loss and Other Tax Carryforwards
Net operating loss carryforwards	2,200,000,000
U.S. Federal Income Tax | Subject To Statutory Limitation
Operating Loss and Other Tax Carryforwards
Net operating loss carryforwards - expiration dates	December 31, 2019 to December 31, 2021
Domestic
Operating Loss and Other Tax Carryforwards
Increase (decrease) in valuation allowance			(182,300,000)
Domestic | Research Credit Carryforwards
Operating Loss and Other Tax Carryforwards
Other tax carryforwards	1,300,000
Other tax carryforwards - expiration dates	December 31, 2019 to December 31, 2020
Foreign
Operating Loss and Other Tax Carryforwards
Net operating loss carryforwards	81,000,000
Increase (decrease) in valuation allowance			(1,000,000)
Deferred Tax Assets (Liabilities), Net Classification
Deferred income taxes	47,000,000	56,400,000
Foreign | Operating Losses
Operating Loss and Other Tax Carryforwards
Net operating loss carryforwards	5,000,000
Net operating loss carryforwards - expiration dates	2028 and 2030
Foreign | Capital Allowance Carryforwards
Operating Loss and Other Tax Carryforwards
Other tax carryforwards	3,100,000
State | Operating Losses
Operating Loss and Other Tax Carryforwards
Net operating loss carryforwards	$ 371,000,000
Net operating loss carryforwards - expiration dates	2020 and 2021