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Note 12 - Stock Repurchase Program (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended				9 Months Ended		86 Months Ended
	Aug. 05, 2022	Sep. 30, 2020	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022
Stock Repurchase Program, Authorized Amount	$ 500,000	$ 250,000
Stock Repurchase Program, Period in Force (Month)	24 months	24 months
Treasury Stock, Shares, Acquired (in shares)			536,633
Treasury Stock, Value, Acquired, Cost Method			$ 123,900				$ 123,900
Payments for Repurchase of Common Stock							$ 123,900	$ (0)	$ 555,439
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)									$ 58.08
Treasury Stock [Member]
Treasury Stock, Shares, Acquired (in shares)			536,633				536,633
Treasury Stock, Value, Acquired, Cost Method			$ 123,900				$ 123,900
Shares Acquired Under Stock Repurchases Program, Shares (in shares)				0	0	0		0	9,563,339

X

- Definition

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

+ References

No definition available.

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- Definition

The cash outflow to reacquire common stock during the period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

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- Definition

Amount of stock repurchase plan authorized.

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- Definition

Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
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Number of shares that have been repurchased during the period and are being held in treasury.

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

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