Real Estate (Key Information for Leases) (Details)	12 Months Ended
	Dec. 31, 2019 property
Lease classification:
Weighted average remaining lease term (years)	11 years 2 months 12 days
Operating
Lease classification:
Operating	3,143
Direct financing
Lease classification:
Direct financing	6
Minimum
Lease classification:
Initial lease terms	10 years
Maximum
Lease classification:
Initial lease terms	20 years