Investments In Unconsolidated Joint Ventures (Statements Of Operations Of The Joint Ventures) (Details) (USD $) In Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Schedule of Equity Method Investments [Line Items]
Total revenue	$ 452,413		$ 386,410		$ 1,306,739		$ 1,158,322
Depreciation and amortization	109,495		81,133		330,003		245,608
Total expenses	287,903		235,328		850,074		696,699
Operating income	164,510		151,082		456,665		461,623
Interest expense	95,777		97,103		290,164		285,887
Net loss	(80,451)		(68,089)		(198,383)		(203,083)
Income from unconsolidated joint ventures	11,326		11,565		28,184		26,940
Unconsolidated Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Total revenue	150,101	[1]	155,126	[1]	440,733	[1]	457,217	[1]
Operating	44,584		45,546		129,698		130,083
Depreciation and amortization	46,773		50,548		145,653		164,763
Total expenses	91,357		96,094		275,351		294,846
Operating income	58,744		59,032		165,382		162,371
Interest expense	57,699		59,120		172,467		176,705
Loss on guarantee obligation			3,581				3,581
Net loss	(38,339)		(3,669)		(46,469)		(17,915)
Company's share of net loss	(23,231)		(487)		(28,570)		(7,207)
Basis differential	25,024		3,125		28,539		7,918
Elimination of inter-entity interest on partner loan	9,533		8,927		28,215		26,229
Income from unconsolidated joint ventures	$ 11,326		$ 11,565		$ 28,184		$ 26,940

[1] Includes straight-line rent adjustments of $6.7 million and $5.9 million for the three months ended September 30, 2011 and 2010, respectively, and $14.8 million and $19.8 million for the nine months ended September 30, 2011 and 2010, respectively. Includes net "above-" and "below-market" rent adjustments of $28.3 million and $30.5 million for the three months ended September 30, 2011 and 2010, respectively, and $87.0 million and $97.6 million for the nine months ended September 30, 2011 and 2010, respectively.