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Real Estate Real Estate (Schedule of Fixed and Variable Lease Payments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Leases, Income Statement, Lease Revenue	$ 294,182	$ 280,813	$ 265,169
Amortization of Lease Incentives	845	387	119
Fixed Lease Escalation [Member]
Operating Leases, Income Statement, Lease Revenue	260,488	253,528	235,343
Variable Lease Escalation [Member]
Operating Leases, Income Statement, Lease Revenue	4,967	4,111	3,617
Straight Line Rent Income [Member]
Operating Leases, Income Statement, Lease Revenue	22,084	22,787	26,090
Escrow Funds Received From Tenants [Member]
Operating Leases, Income Statement, Lease Revenue	$ 5,798	$ 0	$ 0

X

- Definition

Amount of amortization of lease incentive costs incurred by the lessor for the benefit of the lessee.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e40010-112707

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e40019-112707

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X

- Definition

The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707

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