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Note 16 - Stockholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014
Stockholders' Equity Note [Abstract] |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | $ 1,669,065 |  | $ 1,669,065 |  | $ 1,602,888
Increase (Decrease) in Total Equity |  |  | $ 66,200 |  |
Percentage Change in Total Equity |  |  | 4.10% |  |
Net Income (Loss) Attributable to Parent | 45,200 | $ 35,084 | $ 81,180 | $ 66,343 |
Other Comprehensive Income (Loss), Net of Tax | $ (2,136) | $ 13,194 | 2,787 | $ 20,833 |
Dividends, Common Stock, Cash |  |  | $ 19,200 |  |

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