Real Estate (Key Information for Leases) (Details)	3 Months Ended
	Mar. 31, 2020 property
Lease classification:
Operating	3,141
Direct financing	6
Weighted average remaining lease term (years)	11 years 1 month 6 days
Minimum
Lease classification:
Initial lease term	10 years
Maximum
Lease classification:
Initial lease term	20 years