Summary Of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accounting Policies [Abstract]
Total interest costs incurred			$ 57,364	$ 61,155
Interest capitalized			(11,014)	(6,603)
Interest expense	23,213	27,147	46,350	54,552
Cash paid for interest, net of amounts capitalized			40,855	57,410
Cash paid for income taxes			309	378
Mortgage loans assumed with acquisition			68,282	0
Refinance of mortgage loan			11,500	0
Repayment of note payable with public funding/related construction-in-progress offset			10,000	0
Shares issued under dividend reinvestment plan			$ 900	$ 894