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Note 14 - Selected Financial Information of Registrant (Tables) | 9 Months Ended
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Sep. 30, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract] |
Selected Financial Information Of Registrant [Table Text Block] |
(In thousands) | September 30, 2015 |  | December 31, 2014
Investment in subsidiaries, at equity in net assets | $ | 3,098,153 |  |  | $ | 2,746,915 |
Total assets | 3,964,605 |  |  | 3,741,648 |
Long-term debt | 1,230,246 |  |  | 1,192,299 |
Total liabilities | 1,521,298 |  |  | 1,569,898 |
Equity component of currently redeemable convertible senior notes | 7,737 |  |  | 74,690 |
Total stockholders’ equity | 2,435,570 |  |  | 2,097,060 |
Total liabilities and stockholders’ equity | 3,964,605 |  |  | 3,741,648 |

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- Definition Tabular disclosure of condensed financial statements, including, but not limited to, the balance sheet, income statement, and statement of cash flows. + References No definition available. + Details
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