Summary Of Significant Accounting Policies (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Accounting Policies [Abstract]
Total interest costs incurred			$ 78,560	$ 81,272
Interest capitalized			(5,816)	(4,593)
Interest expense	23,795	25,299	72,744	76,679
Cash paid for interest, net of amounts capitalized			76,520	77,773
Cash paid for income taxes			690	240
Mortgage loan assumed with acquisition			42,938
Deconsolidation of VIE			18,311
Capital lease obligations			$ 4,556