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, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	$ 12,137
Other comprehensive income (loss) before reclassifications, net of tax	(19,947)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	(371)
Net current period other comprehensive income (loss), net of tax	(20,318)
Ending balance, net of tax	(8,181)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	18,921
Other comprehensive income (loss) before reclassifications, net of tax	(19,947)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	(874)
Net current period other comprehensive income (loss), net of tax	(20,821)
Ending balance, net of tax	(1,900)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	(6,784)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	503
Net current period other comprehensive income (loss), net of tax	503
Ending balance, net of tax	$ (6,281)