Summary Of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Increase (Decrease) in Temporary Equity [Roll Forward]
Beg Bal Redeemable Noncontrolling Interest, Equity, Carrying Value	$ 94,420	$ 85,325
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	2,887	2,592	3,492
Redeemable Noncontrolling Interests Distributions & Redemptions	(3,822)	(6,985)
Redeemable Noncontrolling Interests Contributions	1,083	19
Adjustments to redeemable noncontrolling interests	9,857	13,469
End Bal Redeemable Noncontrolling Interest, Equity, Carrying Amount	104,425	94,420	85,325
Interest Paid [Abstract]
Total interest costs incurred	121,158	123,441	106,562
Interest capitalized	(16,181)	(10,105)	(8,097)
Interest expense	104,977	113,336	98,465
Cash paid for interest, net of amounts capitalized	120,934	114,419	95,424
Cash (refunded) paid for income taxes	410	(1,151)	832
Mortgage loan assumed/entered into with acquisition	0	67,615	308,506
Deconsolidation of VIE	0	0	18,311
Capital lease obligations	0	0	4,556
Dividends Reinvested in Noncash Financing Transaction	$ 1,779	$ 1,864	$ 1,941