DEBT (Summary of Debt Additional Information) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2011	Mar. 31, 2014 6.30% notes due 2013		Dec. 31, 2013 6.30% notes due 2013		Mar. 31, 2013 6.30% notes due 2013		Mar. 31, 2014 10.125% notes due 2015		Dec. 31, 2013 10.125% notes due 2015		Mar. 31, 2013 10.125% notes due 2015		Mar. 31, 2014 6.50% notes due 2016		Dec. 31, 2013 6.50% notes due 2016		Mar. 31, 2013 6.50% notes due 2016		Mar. 31, 2014 6.40% notes due 2017		Dec. 31, 2013 6.40% notes due 2017		Mar. 31, 2013 6.40% notes due 2017		Mar. 31, 2014 7.00% notes due 2018		Dec. 31, 2013 7.00% notes due 2018		Mar. 31, 2013 7.00% notes due 2018		Mar. 31, 2014 10.375% notes due 2018		Dec. 31, 2013 10.375% notes due 2018		Mar. 31, 2013 10.375% notes due 2018		Mar. 31, 2014 7.50% notes due 2021		Dec. 31, 2013 7.50% notes due 2021		Mar. 31, 2013 7.50% notes due 2021		Mar. 31, 2014 7.15% notes due 2037		Dec. 31, 2013 7.15% notes due 2037		Mar. 31, 2013 7.15% notes due 2037
Debt Instrument [Line Items]
Interest rate	6.50%	6.30%	[1]	6.30%	[1]	6.30%	[1]	10.125%	[2]	10.125%	[2]	10.125%	[2]	6.50%	[3]	6.50%	[3]	6.50%	[3]	6.40%	[4]	6.40%	[4]	6.40%	[4]	7.00%	[5]	7.00%	[5]	7.00%	[5]	10.375%	[6]	10.375%	[6]	10.375%	[6]	7.50%	[7]	7.50%	[7]	7.50%	[7]	7.15%	[8]	7.15%	[8]	7.15%	[8]
Maturity year		2013	[1]	2013	[1]	2013	[1]	2015	[2]	2015	[2]	2015	[2]	2016	[3]	2016	[3]	2016	[3]	2017	[4]	2017	[4]	2017	[4]	2018	[5]	2018	[5]	2018	[5]	2018	[6]	2018	[6]	2018	[6]	2021	[7]	2021	[7]	2021	[7]	2037	[8]	2037	[8]	2037	[8]
Decrease in unamortized discounts						$ 14		$ 163		$ 185		$ 246								$ 55		$ 93		$ 108		$ 217		$ 228		$ 259		$ 1,112		$ 1,157		$ 1,284								$ 624		$ 627		$ 633
Effective interest rate								9.58%						6.00%						7.41%						7.87%						10.63%						7.75%						8.05%
Increase in unamortized deferred gain realized								$ 1,837		$ 2,082		$ 2,766		$ 2,677		$ 11,627		$ 14,221

[1] Includes decreases for unamortized discounts, as follows: March 31, 2013 — $14 thousand.

[2] Includes an increase for the unamortized portion of the deferred gain realized upon the August 2011 settlement of interest rate swaps, as follows: March 31, 2014 — $1,837 thousand, December 31, 2013 — $2,082 thousand and March 31, 2013 — $2,766 thousand. Additionally, includes decreases for unamortized discounts, as follows: March 31, 2014 — $163 thousand, December 31, 2013 — $185 thousand and March 31, 2013 — $246 thousand. The effective interest rate for these notes is 9.58%.

[3] Includes an increase for the unamortized portion of the deferred gain realized upon the August 2011 settlement of interest rate swaps, as follows: March 31, 2014 — $2,677 thousand, December 31, 2013 — $11,627 thousand and March 31, 2013 — $14,221 thousand. The effective interest rate for these notes is 6.00%.

[4] Includes decreases for unamortized discounts, as follows: March 31, 2014 — $55 thousand, December 31, 2013 — $93 thousand and March 31, 2013 — $108 thousand. The effective interest rate for these notes is 7.41%.

[5] Includes decreases for unamortized discounts, as follows: March 31, 2014 — $217 thousand, December 31, 2013 — $228 thousand and March 31, 2013 — $259 thousand. The effective interest rate for these notes is 7.87%.

[6] Includes decreases for unamortized discounts, as follows: March 31, 2014 — $1,112 thousand, December 31, 2013 — $1,157 thousand and March 31, 2013 — $1,284 thousand. The effective interest rate for these notes is 10.63%.

[7] The effective interest rate for these notes is 7.75%.

[8] Includes decreases for unamortized discounts, as follows: March 31, 2014 — $624 thousand, December 31, 2013 — $627 thousand and March 31, 2013 — $633 thousand. The effective interest rate for these notes is 8.05%.