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Note 10 - Changes in Accumulated Other Comprehensive Income by Component (Details) - Amounts Reclassified Out of Accumulated Other Comprehensive Income (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income tax (expense) benefit $ (1,222) $ 579 $ 17,012
Tax valuation allowance 3    
Net income (loss) (70,026) 17,712 (34,704)
Realized gains (losses) on cash flow hedges 586,180 583,035 461,319
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Realized gains on available-for sale securities 90 [1] 785 [1] 44 [1]
Income tax (expense) benefit (33) [1] (275) [1] (15) [1]
Tax valuation allowance 33 [1]    [1]    [1]
Net income (loss) 90 [1] 510 [1] 29 [1]
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income tax (expense) benefit (17) [1] 23 [1] 39 [1]
Tax valuation allowance 17 [1]    [1]    [1]
Net income (loss) 48 [1] (43) [1] (72) [1]
Realized gains (losses) on cash flow hedges 48 [1] (66) [1] (111) [1]
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Tax valuation allowance $ 3    
[1] Amounts in parentheses represent reductions to earnings in the statement of operations.