Note 2 - Adoption of New Accounting Standards (Details) - Amounts Reclassified out of Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Note 2 - Adoption of New Accounting Standards (Details) - Amounts Reclassified out of Accumulated Other Comprehensive Income [Line Items]
	$ (855)	$ (1,051)	$ (3,300)	$ (2,297)
Net of Tax	2,546	2,610	8,913	8,108
	3,890	4,142	13,674	11,844
	(855)	(1,051)	(3,300)	(2,297)
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Note 2 - Adoption of New Accounting Standards (Details) - Amounts Reclassified out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains and losses on available for sale investment securities	2		58
	(1)		(20)
Net of Tax	1		38
	(1)		(20)
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Note 2 - Adoption of New Accounting Standards (Details) - Amounts Reclassified out of Accumulated Other Comprehensive Income [Line Items]
	25		71
Net of Tax	(43)		(131)
Prior service costs	(65)		(193)
Actuarial losses	(3)		(9)
	(68)		(202)
	25		71
Reclassification out of Accumulated Other Comprehensive Income [Member]
Note 2 - Adoption of New Accounting Standards (Details) - Amounts Reclassified out of Accumulated Other Comprehensive Income [Line Items]
Net of Tax	$ (42)		$ (93)