Note 2 - Real Estate - Estimated Net Amortization Income (Expense) (Details) $ in Millions	Dec. 31, 2018 USD ($)
Above-market and below-market leases amortization, net, 2019	$ 13.4
Above-market and below-market leases amortization, net, 2020	13.5
Above-market and below-market leases amortization, net, 2021	13.8
Above-market and below-market leases amortization, net, 2022	12.8
Above-market and below-market leases amortization, net, 2023	12.5
In-place Lease and Tenant Relationships [Member]
In-place leases and tenant relationships amortization, 2019	(32.4)
In-place leases and tenant relationships amortization, 2020	(24.7)
In-place leases and tenant relationships amortization, 2021	(19.1)
In-place leases and tenant relationships amortization, 2022	(14.6)
In-place leases and tenant relationships amortization, 2023	$ (10.9)

Amortization expense of above and below market leases for the next twelve months.

No definition available.

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- Definition

Amortization expense of above and below market leases for the second year.

+ References

No definition available.

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Amortization expense of above and below market leases for the third year.

+ References

No definition available.

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Amortization expense of above and below market leases for the fourth year.

+ References

No definition available.

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Amortization expense of above and below market leases for the fifth year.

+ References

No definition available.

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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