Note 1 - Summary of Significant Accounting Policies (Details) - Changes in Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 6,869
Other comprehensive (loss) income before reclassifications	(10,214)
Amounts reclassified from accumulated other comprehensive income	133
Net current-period other comprehensive (loss) income	(10,081)
Ending balance	(3,212)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	9,411
Other comprehensive (loss) income before reclassifications	(12,992)
Amounts reclassified from accumulated other comprehensive income	(42)
Net current-period other comprehensive (loss) income	(13,034)
Ending balance	(3,623)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(2,542)
Other comprehensive (loss) income before reclassifications	2,778
Amounts reclassified from accumulated other comprehensive income	175
Net current-period other comprehensive (loss) income	2,953
Ending balance	$ 411