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Note 11 - Reclassifications from accumulated other comprehensive income (Details) - Changes in Accumulated Other Comprehensive Income Unrealized Gains and Losses on Available-for-Sale Securities (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Changes in Accumulated Other Comprehensive Income Unrealized Gains and Losses on Available-for-Sale Securities [Abstract]
Balance	$ 7,976	$ 2,597
Other comprehensive loss before reclassifications	(2,538)	2,897
Amounts reclassified from accumulated other comprehensive income	702	646
Net current-period other comprehensive loss - three months ended June 30, 2013	(1,836)	3,543
Balance	$ 6,140	$ 6,140

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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