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GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION (Details) (Senior secured notes, USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Senior secured notes
Financing arrangements
Senior secured notes, at 7.625%, due on August 15, 2016	$ 520,000	$ 520,000
Senior secured notes, interest rate (as a percent)	7.625%

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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