Operating Leases (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 years	Dec. 31, 2012	Dec. 31, 2011
Leases [Abstract]
Rental properties, length of lease, minimum (in years)	1
Rental properties, length of lease, maximum (in years)	34
Operating Leases, Future Minimum Payments Receivable [Abstract]
2014	$ 262,504
2015	261,897
2016	252,801
2017	238,629
2018	215,558
Thereafter	1,377,520
Total	2,608,909
Rental expense	435	467	463
Operating Leases, Future Minimum Payments Due [Abstract]
2014	434
2015	454
2016	358
2017	0
2018	0
Thereafter	0
Total	$ 1,246