Note 13 - Accumulated Other Comprehensive Income (Details) - Changes in Accumulated Other Comprehensive Income by Component (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	$ (11,375)
Other comprehensive income before reclassifications, net of tax	9,667
Amounts reclassified from accumulated other comprehensive income, net of tax	(2,735)
Net current period other comprehensive income, net of tax	6,932
Ending balance, net of tax	(4,443)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	(8,522)
Other comprehensive income before reclassifications, net of tax	9,667
Amounts reclassified from accumulated other comprehensive income, net of tax	(2,978)
Net current period other comprehensive income, net of tax	6,689
Ending balance, net of tax	(1,833)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	(2,853)
Amounts reclassified from accumulated other comprehensive income, net of tax	243
Net current period other comprehensive income, net of tax	243
Ending balance, net of tax	$ (2,610)