Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2014	Dec. 31, 2013
PROPERTIES:
Accumulated depreciation on operating properties		$ 283,119	$ 235,707
Development in Process, Accumulated Depreciation		0	0
Real Estate Held for Sale, Accumulated Depreciation		12,001	21,444
Allowance for doubtful accounts for notes and other receivables		1,335	1,827
Intangible Liabilities, Accumulated Amortization		11,993	6,323
Finite-Lived Intangible Assets, Accumulated Amortization		$ 60,591	$ 37,544
Preferred stock, 20,000,000 shares authorized, $1 par value:
Preferred stock, par value		$ 1	$ 1
Preferred stock, shares authorized		20,000,000	20,000,000
Common stock, par value		$ 1	$ 1
Common stock, shares authorized		250,000,000	250,000,000
Common stock, shares issued		202,043,854	193,236,454
Treasury stock, shares		3,570,082	3,570,082
Preferred stock, dividend rate	7.50%
Preferred stock, shares issued		0	3,791,000
Preferred stock, shares outstanding		0	3,791,000
Preferred stock, liquidation preference			$ 25