Segment Information (Details 1) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Reconciliation of consolidated net operating income
Consolidated net operating income	$ 88,059	$ 84,017	$ 263,169	$ 249,152
Less:
Interest expense	(32,346)	(34,488)	(99,477)	(97,222)
Interest expense - amortization of deferred financing costs	(1,846)	(827)	(3,844)	(2,700)
Depreciation and amortization	(54,252)	(51,644)	(163,940)	(154,962)
Administrative expenses	(6,177)	(5,753)	(18,311)	(18,498)
Plus:
Interest income	523	726	1,385	2,554
Historic tax credit transaction income	12,026		12,026
Equity in income of real estate ventures	418	1,035	2,739	3,356
Net gain on sale of interests in real estate			2,791
Loss on early extinguishment of debt	176	(64)	(580)	(1,701)
Income (loss) from continuing operations, Basic	6,581	(6,998)	(4,042)	(20,021)
Income from discontinued operations	30	382	3,929	7,406
Net income (loss)	$ 6,611	$ (6,616)	$ (113)	$ (12,615)