Rental Property Revenues (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Operating Leases, Future Minimum Payments Receivable [Abstract]
Thereafter	$ 586,420
Operating Leases, Future Minimum Payments Receivable, in Three Years	177,862
Operating Leases, Future Minimum Payments Receivable, in Two Years	185,374
Operating Leases, Future Minimum Payments Receivable, in Four Years	155,719
Operating Leases, Future Minimum Payments Receivable, in Five Years	146,791
Operating Leases, Future Minimum Payments Receivable, Current	187,450
Total Rentals	$ 1,439,616