v3.26.1
Note 8 - Capital Stock - Dividends Declared (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended 162 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2026
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jun. 30, 2026
Common Stock, Dividends, Per Share, Declared (in dollars per share) $ 0.3 $ 0.36 $ 0.36 $ 0.36   $ 1.44 $ 1.44 $ 1.8 $ 2.475 $ 3.9 $ 3.95 $ 4.8 $ 5.35 $ 8.4 $ 8.4 $ 9.6 $ 10.8 $ 6.975 $ 70.09
Dividends           $ 190,930 $ 96,309 $ 81,127 $ 87,906 $ 97,601 $ 53,570 $ 54,421 $ 55,814 $ 70,717 $ 41,388 $ 38,748 $ 22,643 $ 4,662 $ 1,045,092
Forecast [Member]                                      
Common Stock, Dividends, Per Share, Declared (in dollars per share) [1],[2]         $ 0.76                            
Dividends [2]         $ 149,256                            
[1] On April 15, 2026, the Company declared a dividend of $0.10 per share to be paid on May 28, 2026. The effect of this dividend is included in the table above but is not reflected in the Company’s financial statements as of March 31, 2026.
[2] On January 7, 2026, the Company declared a dividend of $0.12 per share to be paid on February 26, 2026. On February 11, 2026, the Company declared a dividend of $0.12 per share to be paid on March 30, 2026. The effect of these dividends are included in the table above, but are not reflected in the Company’s financial statements as of December 31, 2025