Note 13 - Accumulated Other Comprehensive Income (Details) - Changes in accumulated other comprehensive income by component: (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	$ 12,137
Other comprehensive income before reclassifications, net of tax	(18,218)
Amounts reclassified from accumulated other comprehensive income, net of tax	(1,000)
Net current period other comprehensive income, net of tax	(19,218)
Ending balance, net of tax	(7,081)
Unrealized Gains and Losses on Available for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	18,921
Other comprehensive income before reclassifications, net of tax	(18,218)
Amounts reclassified from accumulated other comprehensive income, net of tax	(1,336)
Net current period other comprehensive income, net of tax	(19,554)
Ending balance, net of tax	(633)
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	(6,784)
Amounts reclassified from accumulated other comprehensive income, net of tax	336
Net current period other comprehensive income, net of tax	336
Ending balance, net of tax	$ (6,448)