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Note 7 - Stockholders' Equity and Stock Incentive Plans - Share Repurchases (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2025

Sep. 30, 2024

Sep. 30, 2025

Sep. 30, 2024

Shares repurchased (in shares)

^[1],[2]

1,904

3,461

7,837

8,264

Total cost, including brokerage fees

^[2],[3]

$ 160,007

$ 202,032

$ 593,004

$ 483,218

Average repurchase price per share (in dollars per share)

^[2],[4]

$ 84.05

$ 58.37

$ 75.67

$ 58.48

[1]	All shares repurchased have been retired and constitute authorized but unissued shares.
[2]	Shares repurchased reflect repurchases settled during the three and nine months ended September 30, 2025 and 2024. These amounts exclude repurchases, if any, traded but not yet settled on or before September 30, 2025 and 2024, respectively.
[3]	Costs exclude 1% excise tax on corporate stock buybacks.
[4]	Amounts in the table may not recalculate exactly due to rounding. Average repurchase price per share is calculated based on unrounded numbers and excludes the 1% excise tax.

X

- Definition

Average repurchase price per share under the share repurchase program.

+ References

No definition available.

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X

- Definition

Value of stock repurchased and retire during period excludes exercise tax.

+ References

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X

- Definition

Number of shares that have been repurchased and retired during the period.

+ 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(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: 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 4: 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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