Real Estate Real Estate (Future Minimum Lease Payments) (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Future Minimum Lease Payments [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 192,559
Operating Leases, Future Minimum Payments, Due in Two Years	192,040
Operating Leases, Future Minimum Payments, Due in Three Years	179,332
Operating Leases, Future Minimum Payments, Due in Four Years	175,329
Operating Leases, Future Minimum Payments, Due in Five Years	171,947
Operating Leases, Future Minimum Payments, Due Thereafter	1,438,249
Operating Leases, Future Minimum Payments Due	$ 2,349,456