Leases (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Tenants	Dec. 31, 2012	Dec. 31, 2011
Operating Leases Future Minimum Payments Receivable [Abstract]
2014	$ 1,811,280
2015	1,648,957
2016	1,535,967
2017	1,406,377
2018	1,272,529
Thereafter	6,529,277
Percentage Rent	8,796	8,466	7,995
Income pursuant to a settlement with Stop & Shop	59,599
Number Of Tenants Contributing Ten Percent Or More Of Total Revenues	0
Percentage Of Minimum Revenue Threshold Contributed By One Tenant	10.00%	10.00%	10.00%
Operating Leases Future Minimum Payments Due [Abstract]
2014	42,845
2015	41,997
2016	41,404
2017	42,530
2018	40,301
Thereafter	1,277,370
Lessee Leasing Arrangements Operating Leases Term Of Contract	30 years
Rent Expense	51,186	43,274	35,553
Capital Leases Future Minimum Payments Due [Abstract]
2014	12,500
2015	12,500
2016	12,500
2017	12,500
2018	12,500
Thereafter	347,292
Total Minimum Obligations	409,792
Interest Portion	(169,792)
Present Value Of Net Minimum Payments	240,000
Property Leased Under Capital Leases Cost	$ 292,101