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Note 14 - Accumulated Other Comprehensive Income ("AOCI") - Components of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]    
Balance $ 6,616 $ 329
Other comprehensive income before reclassifications 2,354 (8,536)
Amounts reclassified from AOCI [1]
Net current-period other comprehensive income 2,354 (8,536)
Balance 8,970 (8,207)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]    
Balance 398 46,197
Other comprehensive income before reclassifications (33) (6,112)
Amounts reclassified from AOCI (32,435) [1]
Net current-period other comprehensive income (33) (38,547)
Balance 365 7,650
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]    
Balance (1,426) (1,404)
Other comprehensive income before reclassifications (759) 55
Amounts reclassified from AOCI [1]
Net current-period other comprehensive income (759) 55
Balance (2,185) (1,349)
Balance 5,588 45,122
Other comprehensive income before reclassifications 1,562 (14,593)
Amounts reclassified from AOCI (32,435) [1]
Net current-period other comprehensive income 1,562 (47,028)
Balance $ 7,150 $ (1,906)
[1] Amounts reclassified to Interest, dividends and other investment income on the Company's Condensed Consolidated Statements of Income.