Subsequent Events (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended		9 Months Ended	0 Months Ended
	Oct. 12, 2012 Issuance of Equity [Member] Series F Cumulative Redeemable Preferred Shares Member [Member]	Nov. 05, 2012 Repurchase of Equity [Member] Series D Cumulative Redeemable Preferred Shares [Member]	Sep. 30, 2012 First Mortgage [Member]	Oct. 29, 2012 NC Music Factory [Member] First Mortgage [Member] New Contract [Member]
Subsequent Event [Line Items]
Preferred Stock, Liquidation Preference Per Share	$ 25.00
Preferred Shares, shares issued	5,000,000	4,600,000
Proceeds from Issuance of Convertible Preferred Stock	$ 120.7
Preferred Stock, Dividend Rate, Per-Dollar-Amount	$ 1.65625
Preferred share dividend percentage	6.625%	7.375%
Secured first mortgage loan agreement				$ 22.0
Mortgage Loans on Real Estate, Interest Rate			9.50%	10.25%
mortgage loan on real estate, interest rate, increase				1.00%
Frequency of Interest Rate Increases (In Years)				5 years