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INCOME TAXES - Summary of changes in deferred tax asset valuation allowance (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Balance, January 1,	$ 123,414	$ 138,693	$ 128,978
Increase (decrease) in deferred tax assets	1,019	(15,279)	9,715
Balance, December 31,	$ 124,433	$ 123,414	$ 138,693

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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