Discontinued Operations (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
REVENUES
Disposal Group Including Discontinued Operation Rental Revenue	$ 8,418,000		$ 108,459,000		$ 110,986,000		$ 334,968,000
Disposal Group, Including Discontinued Operation, Revenue	8,418,000		108,459,000		110,986,000		334,968,000
EXPENSES
Disposal Group Including Discontinued Operation Property And Maintenance	3,272,000	[1]	25,608,000	[1]	33,181,000	[1]	79,482,000	[1]
Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance	396,000	[1]	11,480,000	[1]	10,578,000	[1]	29,599,000	[1]
Disposal Group Including Discontinued Operations Property Management	0		70,000	[1]	1,000	[1]	211,000	[1]
Disposal Group Including Discontinued Operation Depreciation	2,273,000	[1]	29,497,000	[1]	31,976,000	[1]	94,792,000	[1]
Disposal Group Including Discontinued Operation General And Administrative	3,000	[1]	44,000	[1]	76,000	[1]	87,000	[1]
Disposal Group, Including Discontinued Operation, Operating Expense	5,944,000	[1]	66,699,000	[1]	75,812,000	[1]	204,171,000	[1]
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	2,474,000		41,760,000		35,174,000		130,797,000
Disposal Group Including Discontinued Operation Interest And Other Income	65,000		34,000		156,000		81,000
Disposal Group Including Discontinued Operation Other Expenses	0		(23,000)		(3,000)		(170,000)
Interest (2)
Expense Incurred, Net	(18,000)	[2]	(995,000)	[2]	(1,276,000)	[2]	(3,357,000)	[2]
Disposal Group Including Discontinued Operation Amortization Of Deferred Financing Costs	0	[2]	(27,000)	[2]	(228,000)	[2]	(119,000)	[2]
Discontinued Operation, Tax Effect of Discontinued Operation	(40,000)		(1,000)		(503,000)		23,000
Income Loss From Discontinued Operations	2,481,000		40,748,000		33,320,000		127,255,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	401,703,000		103,394,000		1,990,577,000		307,447,000
Discontinued operations, net	404,184,000		144,142,000		2,023,897,000		434,702,000
Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net									1,964,677,220
Disposal Group Including Discontinued Operation Mortgage Notes Payable									$ 34,386,391

[1] Includes expenses paid in the current period for properties sold in prior periods related to the Company’s period of ownership.

[2] Includes only interest expense specific to secured mortgage notes payable for properties sold.