Note 15 - Derivative Financial Instruments - Summary of Fair Value Amounts of Derivative Instruments (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative assets	$ 0	$ 261
Derivative liabilities	9,018	4,899
Net Derivative Asset (Liability)	(9,018)	(4,638)
Interest Rate Swap [Member]
Derivative assets	0	261
Derivative liabilities	9,018	4,899
Other Noncurrent Assets [Member] \| Interest Rate Swap [Member]
Derivative assets	0	261
Other Noncurrent Liabilities [Member] \| Interest Rate Swap [Member]
Derivative liabilities	$ 9,018	$ 4,899

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

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