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Note 11 - Marketable Securities | 12 Months Ended
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Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract] |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] |
11. | Marketable Securities:
The amortized cost and estimated fair values of securities available-for-sale and held-to-maturity at December 31, 2015 and 2014, are as follows (in thousands):
|  | December 31, 2015 |
|  | Amortized Cost |  |  | Gross Unrealized Gains/Losses |  |  | Estimated Fair Value |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  | $ | 5,511 |  |  | $ | 398 |  |  | $ | 5,909 |
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
Debt securities |  |  | 1,656 |  |  |  | (1 | ) |  |  | 1,655 |
Total marketable securities |  | $ | 7,167 |  |  | $ | 397 |  |  | $ | 7,564 |
|  | December 31, 2014 |
|  | Amortized Cost |  |  | Gross Unrealized Gains/Losses |  |  | Estimated Fair Value |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  | $ | 41,462 |  |  | $ | 46,197 |  |  | $ | 87,659 |
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
Debt securities |  |  | 2,576 |  |  |  | (200 | ) |  |  | 2,376 |
Total marketable securities |  | $ | 44,038 |  |  | $ | 45,997 |  |  | $ | 90,035 |
During 2015, 2014 and 2013, the Company received $76.2 million, $3.8 million and $26.4 million in proceeds from the sale or redemption of certain marketable securities, respectively. In connection with these transactions, during 2015, 2014 and 2013, the Company recognized $39.9 million of realizable gains, $0.1 million of realizable losses and $12.1 million of realizable gains, respectively. As of December 31, 2015, the contractual maturities of debt securities classified as held-to-maturity are within the next five years. Actual maturities may differ from contractual maturities as issuers may have the right to prepay debt obligations with or without prepayment penalties.

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