Note 11 - Other Assets (Details Textual) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Real Estate Held-for-sale		$ 17.2
Real Estate Owned, Accumulated Depreciation		$ 5.5
Albertsons Companies, Inc [Member]
Percentage of Ownership	9.48%
Albertstons Companies, Inc. [Member] \| Other Assets [Member]
Other Investments, Total	$ 140.2

Amount of investments classified as other.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f,g))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant