Note 4 - Capital Stock (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended	12 Months Ended
	Feb. 20, 2026	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Common Stock, Dividends, Per Share, Declared			$ 0.44
Common Stock, Capital Shares Reserved for Future Issuance			3,100,000
Treasury Stock, Shares, Acquired		6,269,000
Treasury Stock, Value, Acquired, Cost Method		$ 923,300	$ 923,292	$ 513,924	$ 159,576
Share Repurchase Program, Remaining Authorized, Amount			967,600
Exercise or Vesting [Member]
Stock To Be Issued, Value, Vesting of Equity Awards			$ 1,000
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.45