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Note 5 - Capital Stock (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Apr. 27, 2023	Jan. 19, 2023	Mar. 31, 2023	Mar. 31, 2022	Jul. 20, 2022	Jan. 22, 2020
Stock Repurchase Program, Authorized Amount					$ 500,000	$ 500,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount			$ 520,000
Treasury Stock, Shares, Acquired			183,000
Treasury Stock, Value, Acquired, Cost Method			$ 30,849	$ 75,018
Common Stock, Dividends, Per Share, Declared		$ 0.42
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.42

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 stock repurchase plan authorized.

+ References

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- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

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- Definition

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

+ References

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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.

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