Operating Leases (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Property Subject to or Available for Operating Lease [Line Items]
Number of Real Estate Properties	87
Number of States in which Entity Has Properties	13
Number Of Leases	2,500
Percent of Annualized Base Rent	3.50%
Operating Leases, Future Minimum Payments Receivable [Abstract]
2014	$ 451,142
2015	413,798
2016	367,433
2017	308,499
2018	241,199
Thereafter	1,416,073
Total	$ 3,198,144
Residential Real Estate [Member] | Maximum [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating Lease, Term	1 year
Commercial Real Estate [Member] | Maximum [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating Lease, Term	10 years
Commercial Real Estate [Member] | Minimum [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating Lease, Term	3 years