Note 9 - Components of Accumulated Other Comprehensive Loss (Details) - Components of Accumulated Other Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Sep. 30, 2012 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Sep. 30, 2013 Accumulated Defined Benefit Plans Adjustment [Member]	Dec. 31, 2012 Accumulated Defined Benefit Plans Adjustment [Member]	Sep. 30, 2012 Accumulated Defined Benefit Plans Adjustment [Member]	Dec. 31, 2011 Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (2,738)	$ (1,321)	$ 2,047	$ 2,646	$ (4,785)	$ (4,785)	$ (3,967)	$ (3,967)
Unrealized Holding Gains (Losses)	(3,818)	(653)	(13,234)	(331)	(13,234)	(331)
Reclassification Adjustment	57	12	3	(13)	3	(13)
Ending Balance	$ (15,969)	$ (1,665)	$ (15,969)	$ (1,665)	$ (11,184)	$ 2,302	$ (4,785)	$ (4,785)	$ (3,967)	$ (3,967)