Summary Of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Accounting Policies [Abstract]
Total interest costs incurred			$ 93,213	$ 78,560
Interest capitalized			(7,469)	(5,816)
Interest expense	28,218	23,795	85,744	72,744
Cash paid for interest, net of amounts capitalized			89,959	76,520
Cash (refunded) paid for income taxes			(1,144)	690
Loans Assumed			0	42,938
NonCash Deconsolidation Of Variable Interest Entity			0	18,311
Capital Lease Obligations Incurred			$ 0	$ 4,556