CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Details)	Mar. 31, 2012	Dec. 31, 2011
8 1/2% Senior Notes due 2014
CONDENSED CONSOLIDATING FINANCIAL INFORMATION
Debt instrument, interest rate (as a percent)	8.50%	8.50%
8 1/2% Senior Notes due 2014 | Guarantor Subsidiary
CONDENSED CONSOLIDATING FINANCIAL INFORMATION
Debt instrument, interest rate (as a percent)	8.50%
7 1/4% Senior Notes due 2019
CONDENSED CONSOLIDATING FINANCIAL INFORMATION
Debt instrument, interest rate (as a percent)	7.25%	7.25%
7 1/4% Senior Notes due 2019 | Guarantor Subsidiary
CONDENSED CONSOLIDATING FINANCIAL INFORMATION
Debt instrument, interest rate (as a percent)	7.25%