Note 13 - Accumulated Other Comprehensive Income (Details) - Significant Amounts Reclassified Out of Accumulated Other Comprehensive Income by Component (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Note 13 - Accumulated Other Comprehensive Income (Details) - Significant Amounts Reclassified Out of Accumulated Other Comprehensive Income by Component [Line Items]
Amortization of defined benefit pension items, Tax benefit	$ (7,598)		$ (6,155)		$ (14,525)		$ (10,474)
Unrealized gains (losses) on available for sale securities, OTTI charges			(503)				(503)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Note 13 - Accumulated Other Comprehensive Income (Details) - Significant Amounts Reclassified Out of Accumulated Other Comprehensive Income by Component [Line Items]
Amortization of defined benefit pension items, Actuarial losses	(175)	[1]	(309)	[1]	(350)	[1]	(618)	[1]
Amortization of defined benefit pension items, Prior service credits	12	[1]	11	[1]	23	[1]	22	[1]
Amortization of defined benefit pension items, Total before tax	(163)		(298)		(327)		(596)
Amortization of defined benefit pension items, Tax benefit	72				176		260
Amortization of defined benefit pension items, Net of tax	(91)		(168)		(151)		(336)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Note 13 - Accumulated Other Comprehensive Income (Details) - Significant Amounts Reclassified Out of Accumulated Other Comprehensive Income by Component [Line Items]
Amortization of defined benefit pension items, Tax benefit			(8)				(1,257)
Amortization of defined benefit pension items, Net of tax			10				1,619
Unrealized gains (losses) on available for sale securities, Net gain on sale of securities			18				2,876
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Other-than-Temporary Impairment [Member]
Note 13 - Accumulated Other Comprehensive Income (Details) - Significant Amounts Reclassified Out of Accumulated Other Comprehensive Income by Component [Line Items]
Amortization of defined benefit pension items, Tax benefit			220				220
Amortization of defined benefit pension items, Net of tax			(283)				(283)
Unrealized gains (losses) on available for sale securities, OTTI charges			(503)				(503)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Note 13 - Accumulated Other Comprehensive Income (Details) - Significant Amounts Reclassified Out of Accumulated Other Comprehensive Income by Component [Line Items]
Amortization of defined benefit pension items, Tax benefit			$ 130

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (See Note 9 of the Notes to Consolidated Financial Statements "Pension and Other Postretirement Benefit Plans".)