Note 9 - Components of Accumulated Other Comprehensive Loss (Details) - Components of Accumulated Other Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jun. 30, 2012 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jun. 30, 2013 Accumulated Defined Benefit Plans Adjustment [Member]	Dec. 31, 2012 Accumulated Defined Benefit Plans Adjustment [Member]	Jun. 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)	(8,512)	1,229	(9,415)	322	(9,415)	322
Reclassification Adjustment	7	4	(55)	(25)	(55)	(25)
Ending Balance	$ (12,208)	$ (1,024)	$ (12,208)	$ (1,024)	$ (7,423)	$ 2,943	$ (4,785)	$ (4,785)	$ (3,967)	$ (3,967)