NOTES PAYABLE AND COMMERCIAL BANK FINANCING (Details) (USD $)	9 Months Ended		0 Months Ended		9 Months Ended	0 Months Ended			0 Months Ended			0 Months Ended				0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jul. 23, 2014 5.625% Senior Unsecured Notes, due 2024	Sep. 30, 2014 5.625% Senior Unsecured Notes, due 2024	Sep. 30, 2014 5.625% Senior Unsecured Notes, due 2024 Bank Credit Agreement	Jul. 23, 2014 5.625% Senior Unsecured Notes, due 2024 Period prior to August 1, 2019	Jul. 31, 2014 Term Loan B, due 2021 Bank Credit Agreement	Sep. 30, 2014 Term Loan B, due 2021 Bank Credit Agreement	Jul. 31, 2014 Term Loan B, due 2021 Bank Credit Agreement LIBOR	Jul. 31, 2014 Term Loan A Bank Credit Agreement	Sep. 30, 2014 Term Loan A Bank Credit Agreement	Jul. 31, 2014 Delayed draw term loan A Bank Credit Agreement	Sep. 30, 2014 Delayed draw term loan A Bank Credit Agreement	Sep. 30, 2014 Revolving commitments Bank Credit Agreement	Jul. 31, 2014 Revolving commitments Bank Credit Agreement	Oct. 15, 2014 8.375% Senior Unsecured Notes, due 2018 October 15, 2014 Scenario forecast	Oct. 15, 2014 8.375% Senior Unsecured Notes, due 2018 Subsequent Event
Notes Payable And Commercial Bank Financing
Amount of debt issued			$ 550,000,000				$ 400,000,000
Debt instrument, stated interest rate payable (as a percent)				5.625%	5.625%												8.375%
Percentage of par value at which debt was issued			100.00%				99.75%
Redemption price of the debt instrument (as a percent)						100.00%
Maximum percentage of the principal amount of the debt instrument which the entity may redeem with the proceeds from certain equity offerings						35.00%
Variable rate basis									LIBOR
Interest rate margin (as a percent)									2.75%
LIBOR floor (as a percent)									0.75%
Amount of debt converted into revolving commitments										327,700,000		72,500,000
Remaining borrowing capacity before conversion of debt												108,200,000
Outstanding loan amount								1,041,500,000			319,300,000		35,700,000
Financing costs					14,600,000
Payment of debt																	237,500,000
Total revolver capacity														482,200,000	485,200,000
Accrued and unpaid interest and make-whole premium																	9,900,000
Redemption price	286,417,000	998,085,000															257,400,000
Loss on extinguishment		$ (16,283,000)														$ 14,600,000