Summary Of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accounting Policies [Abstract]
Total interest costs incurred	$ 28,703	$ 30,241
Interest capitalized	(5,566)	(2,836)
Interest expense	23,137	27,405
Cash paid for interest, net of amounts capitalized	20,463	30,315
Cash paid for income taxes	208	294
Mortgage loans assumed with acquisition	68,282	0
Shares issued under dividend reinvestment plan	$ 450	$ 450