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Note 8 - Marketable Securities and Other Investments | 3 Months Ended
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Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract] |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] | 8. Marketable Securities and Other Investments At March 31, 2015, the Company’s investment in marketable securities was $105.3 million, which includes an aggregate unrealized gain of $61.9 million relating to marketable equity security investments. During April 2015, the Company sold 6.4 million shares of its Supervalu Inc. common stock for an aggregate price of $58.6 million. As a result of this transaction, the Company will recognize a realized gain of approximately $32.4 million during the second quarter ended June 30, 2015.

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