Leases (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Minimum Future Rental Receipts [Abstract]
2014	$ 362,743
2015	334,370
2016	303,455
2017	272,390
2018	249,645
Thereafter	5,767,751
Future Minimum Payments Receivable	7,290,354
Future Rental Payments [Abstract]
2014	5,229
2015	5,203
2016	4,907
2017	4,861
2018	4,645
Thereafter	39,484
Future Minimum Payments Due	64,329
Rent expense for leasehold interests	1,284	1,198	776
Fixed rent per annum payment thereafter	1,153
Incentive from lessor	845
Minimum lease payment 2014	66
Minimum lease payment 2015	55
Minimum lease payment 2016	55
Minimum lease payment 2017	14
Rent expense for corporate headquarters	$ 1,338	$ 1,029	$ 1,392