Discontinued Operations (Details) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
REVENUES
Disposal Group Including Discontinued Operation Rental Revenue	$ 8,313,000		$ 98,628,000		$ 73,144,000		$ 198,955,000
Disposal Group, Including Discontinued Operation, Revenue	8,313,000		98,628,000		73,144,000		198,955,000
EXPENSES
Disposal Group Including Discontinued Operation Property And Maintenance	6,707,000	[1]	22,977,000	[1]	23,062,000	[1]	47,382,000	[1]
Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance	468,000	[1]	10,029,000	[1]	7,304,000	[1]	15,420,000	[1]
Disposal Group Including Discontinued Operations Property Management	0		71,000	[1]	1,000	[1]	141,000	[1]
Disposal Group Including Discontinued Operation Depreciation	2,465,000	[1]	27,560,000	[1]	22,160,000	[1]	58,833,000	[1]
Disposal Group Including Discontinued Operation General And Administrative	64,000	[1]	39,000	[1]	71,000	[1]	43,000	[1]
Disposal Group, Including Discontinued Operation, Operating Expense	9,704,000	[1]	60,676,000	[1]	52,598,000	[1]	121,819,000	[1]
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	(1,391,000)		37,952,000		20,546,000		77,136,000
Disposal Group Including Discontinued Operation Interest And Other Income	38,000		19,000		91,000		47,000
Disposal Group Including Discontinued Operation Other Expenses	(1,000)		(30,000)		(3,000)		(147,000)
Interest (2)
Expense Incurred, Net	(6,000)	[2]	(1,279,000)	[2]	(1,258,000)	[2]	(2,362,000)	[2]
Disposal Group Including Discontinued Operation Amortization Of Deferred Financing Costs	0	[2]	(46,000)	[2]	(228,000)	[2]	(92,000)	[2]
Discontinued Operation, Tax Effect of Discontinued Operation	(405,000)		128,000		(463,000)		24,000
Income Loss From Discontinued Operations	(1,765,000)		36,744,000		18,685,000		74,606,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	389,952,000		71,097,000		1,588,874,000		204,053,000
Discontinued operations, net	388,187,000		107,841,000		1,607,559,000		278,659,000
Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net									1,718,111,206
Disposal Group Including Discontinued Operation Mortgage Notes Payable									$ 34,386,391

[1] Includes expenses paid in the current period for properties sold or held for sale 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 and/or held for sale.