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LONG-TERM DEBT (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Long-term Debt, Gross	$ 825,998	$ 815,652
Current portion of long-term debt	4,587	3,860
Amortization of Debt Discount (Premium)	6,068	6,748
LONG-TERM DEBT, net of current portion and original issue discount	815,343	805,044
Senior Subordinated Notes [Member] \| February 2013 [Member]
Long-term Debt, Gross	747	747
Senior Subordinated Notes [Member] \| May 2016 [Member]
Long-term Debt, Gross	327,035	312,800
Senior Notes [Member]
Long-term Debt, Gross	119,000	119,000
Senior Bank Term Debt [Member]
Long-term Debt, Gross	$ 379,216	$ 383,105

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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- Definition

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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