Note 9 - Components of Accumulated Other Comprehensive Loss (Details) - Components of Accumulated Other Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Mar. 31, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Mar. 31, 2014 Accumulated Defined Benefit Plans Adjustment [Member]	Dec. 31, 2013 Accumulated Defined Benefit Plans Adjustment [Member]	Mar. 31, 2013 Accumulated Defined Benefit Plans Adjustment [Member]	Dec. 31, 2012 Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (16,964)	$ (2,738)	$ (14,011)	$ 2,047	$ (2,953)	$ (2,953)	$ (4,785)	$ (4,785)
Unrealized Holding Gains (Losses)	3,121	(959)	3,121	(959)
Reclassification Adjustment		(6)		(6)
Balance	$ (13,843)	$ (3,703)	$ (10,890)	$ 1,082	$ (2,953)	$ (2,953)	$ (4,785)	$ (4,785)