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Note 8 - Dividends (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Common Stock, Dividends, Per Share, Declared													$ 0.24	$ 0.24	$ 0.24
Payments of Ordinary Dividends, Common Stock													$ 19,540	$ 19,509	$ 19,563
O 2024 Q1 Dividends [Member]
Common Stock, Dividends, Per Share, Declared				$ 0.06
O 2024 Q2 Dividends [Member]
Common Stock, Dividends, Per Share, Declared			$ 0.06
O 2024 Q3 Dividends [Member]
Common Stock, Dividends, Per Share, Declared		$ 0.06
O 2024 Q4 Dividends [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.06
O 2023 Q1 Dividends [Member]
Common Stock, Dividends, Per Share, Declared								$ 0.06
O 2023 Q2 Dividends [Member]
Common Stock, Dividends, Per Share, Declared							$ 0.06
O 2023 Q3 Dividends [Member]
Common Stock, Dividends, Per Share, Declared						$ 0.06
O 2023 Q4 Dividends [Member]
Common Stock, Dividends, Per Share, Declared					$ 0.06
O 2022 Q1 Dividends [Member]
Common Stock, Dividends, Per Share, Declared												$ 0.06
O 2022 Q2 Dividends [Member]
Common Stock, Dividends, Per Share, Declared											$ 0.06
O 2022 Q3 Dividends [Member]
Common Stock, Dividends, Per Share, Declared										$ 0.06
O 2022 Q4 Dividends [Member]
Common Stock, Dividends, Per Share, Declared									$ 0.06

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

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- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

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