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Note 7 - Marketable Securities (Details Textual) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Proceeds from Sale and Maturity of Marketable Securities | $ 299,634 | $ 138,207
Dividend Income, Equity Securities, Operating |  | $ 194,100
Marketable Securities, Cash Dividend Receivable, Per Share (in dollars per share) |  | $ 0.09
Albertsons Companies, Inc [Member] |  |
Sale of Marketable Securities (in shares) | 14.2 | 7.1
Proceeds from Sale and Maturity of Marketable Securities | $ 299,100 | $ 137,400
Equity Securities, FV-NI, Realized Gain (Loss) | 288,700 | 115,400
Equity Securities, Taxes Paid on Capital Gains | $ 72,900 | $ 30,000

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