NOTES PAYABLE AND COMMERCIAL BANK FINANCING (Details) (USD $)	3 Months Ended	0 Months Ended		0 Months Ended	1 Months Ended	0 Months Ended	3 Months Ended	1 Months Ended		0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2013 5.375% Senior Unsecured Notes, due 2021	Mar. 31, 2013 5.375% Senior Unsecured Notes, due 2021	Apr. 02, 2013 5.375% Senior Unsecured Notes, due 2021 Period prior to April 1, 2016	Apr. 30, 2012 Term Loan A Freedom	Apr. 09, 2013 Term Loan A Bank Credit Agreement	Mar. 31, 2013 Term Loan A Bank Credit Agreement	Jan. 31, 2012 Term Loan B Four Points	Apr. 30, 2012 Term Loan B Freedom	Apr. 09, 2013 Term Loan B Bank Credit Agreement	Mar. 31, 2013 Term Loan B Bank Credit Agreement	Apr. 09, 2013 Term Loan B Bank Credit Agreement Scenario forecast	Mar. 31, 2013 Revolving line of credit Bank Credit Agreement	Apr. 09, 2013 Revolving line of credit Bank Credit Agreement	Mar. 31, 2013 6.125% Senior Unsecured Notes, due 2022
Notes Payable And Commercial Bank Financing
Amount of draw under incremental loan commitment used to finance acquisition		$ 600,000,000			$ 157,500,000	$ 500,000,000		$ 180,000,000	$ 192,500,000	$ 400,000,000
Debt instrument, stated interest rate payable (as a percent)		5.375%													6.125%
Percentage of par value at which debt was issued		100.00%
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%
Deferred financing costs			10,400,000
Variable rate basis							LIBOR				LIBOR		LIBOR
Interest rate margin (as a percent)							2.25%				2.25%		2.25%
LIBOR floor (as a percent)											0.75%
Borrowing capacity														100,000,000
Amount drawn on delayed basis						445,000,000
Gain (loss) from extinguishments of debts	335,000											16,000,000
Deferred financing costs related to amendment												7,000,000
Interest expense												$ 5,000,000