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Note 23 - Other Comprehensive Income - Changes in Each Component of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Balance at Beginning of Period $ 191 $ 2,647 $ (3,319)
Other comprehensive income (loss) before reclassifications (3,214) (1,104) 5,979
Amounts reclassified from accumulated other comprehensive income (loss) 642 (1,352) (13)
Net other comprehensive income (loss) during period (2,572) (2,456) 5,966
Balance at End of Period (2,381) 191 2,647
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]      
Balance at Beginning of Period 1,041 2,647 (3,319)
Other comprehensive income (loss) before reclassifications (2,280) (254) 5,979
Amounts reclassified from accumulated other comprehensive income (loss) (716) (1,352) (13)
Net other comprehensive income (loss) during period (2,996) (1,606) 5,966
Balance at End of Period (1,955) 1,041 2,647
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]      
Balance at Beginning of Period (850)
Other comprehensive income (loss) before reclassifications (934) (850)
Amounts reclassified from accumulated other comprehensive income (loss) 1,358
Net other comprehensive income (loss) during period 424 (850)
Balance at End of Period $ (426) $ (850)