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Note 12 - Stock Repurchase Program (Details Textual) - USD ($)		1 Months Ended	3 Months Ended				6 Months Ended	107 Months Ended
	Feb. 12, 2024	Sep. 30, 2020	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2024	Aug. 05, 2022
Stock Repurchase Program, Authorized Amount	$ 500,000,000	$ 250,000,000							$ 500,000,000
Stock Repurchase Program, Period in Force (Year)	24 months	24 years
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 26,297,000
Treasury Stock, Value, Acquired, Cost Method			$ 50,609				$ 50,609,000
Treasury Stock, Common [Member]
Treasury Stock, Shares, Acquired (in shares)			355,640				355,640
Treasury Stock, Value, Acquired, Cost Method			$ 50,609				$ 50,609,000
Stock Repurchase Program [Member] | Treasury Stock, Common [Member]
Treasury Stock, Shares, Acquired (in shares)			355,640	0	0	0		14,292,828
Treasury Stock, Value, Acquired, Cost Method			$ 50,609,000					$ 1,079,501,000
Shares Acquired, Average Cost Per Share (in dollars per share)								$ 75.53

X

- Definition

Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

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X

- Definition

Period share may be purchased under authorized share repurchase plan, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

+ Details

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X

- Definition

Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

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X

- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481549/505-30-45-1

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X

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-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

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

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-Section 45
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147481549/505-30-45-1

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