Real Estate Real Estate (Future Minimum Lease Payments) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Future Minimum Lease Payments [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 299,904
Operating Leases, Future Minimum Payments, Due in Two Years	286,000
Operating Leases, Future Minimum Payments, Due in Three Years	282,285
Operating Leases, Future Minimum Payments, Due in Four Years	275,742
Operating Leases, Future Minimum Payments, Due in Five Years	272,208
Operating Leases, Future Minimum Payments, Due Thereafter	1,432,609
Operating Leases, Future Minimum Payments Due	$ 2,848,748