Note 2 - Securities (Details) - Securities with Unrealized Losses not Recognized in Income (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Note 2 - Securities (Details) - Securities with Unrealized Losses not Recognized in Income [Line Items]
Available for Sale Securities with Unrealized Losses, Less than 12 Months, Fair Value	$ 121,633	$ 97,113
Available for Sale Securities with Unrealized Losses, Less than 12 Months, Unrealized Losses	(1,071)	(1,683)
Available for Sale Securities with Unrealized Losses, 12 Months or More, Fair Value	28,316	32,167
Available for Sale Securities with Unrealized Losses, 12 Months or More, Unrealized Losses	(436)	(450)
Available for Sale Securities with Unrealized Losses, Fair Value	149,949	129,280
Available for Sale Securities with Unrealized Losses, Unrealized Losses	(1,507)	(2,133)
US Government Agencies Debt Securities [Member]
Note 2 - Securities (Details) - Securities with Unrealized Losses not Recognized in Income [Line Items]
Available for Sale Securities with Unrealized Losses, Less than 12 Months, Fair Value	49,666	23,077
Available for Sale Securities with Unrealized Losses, Less than 12 Months, Unrealized Losses	(316)	(237)
Available for Sale Securities with Unrealized Losses, 12 Months or More, Fair Value	4,607	9,836
Available for Sale Securities with Unrealized Losses, 12 Months or More, Unrealized Losses	(28)	(48)
Available for Sale Securities with Unrealized Losses, Fair Value	54,273	32,913
Available for Sale Securities with Unrealized Losses, Unrealized Losses	(344)	(285)
US States and Political Subdivisions Debt Securities [Member]
Note 2 - Securities (Details) - Securities with Unrealized Losses not Recognized in Income [Line Items]
Available for Sale Securities with Unrealized Losses, Less than 12 Months, Fair Value	43,068	53,185
Available for Sale Securities with Unrealized Losses, Less than 12 Months, Unrealized Losses	(541)	(1,176)
Available for Sale Securities with Unrealized Losses, 12 Months or More, Fair Value	17,049	14,085
Available for Sale Securities with Unrealized Losses, 12 Months or More, Unrealized Losses	(339)	(337)
Available for Sale Securities with Unrealized Losses, Fair Value	60,117	67,270
Available for Sale Securities with Unrealized Losses, Unrealized Losses	(880)	(1,513)
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Note 2 - Securities (Details) - Securities with Unrealized Losses not Recognized in Income [Line Items]
Available for Sale Securities with Unrealized Losses, Less than 12 Months, Fair Value	22,445	16,719
Available for Sale Securities with Unrealized Losses, Less than 12 Months, Unrealized Losses	(179)	(235)
Available for Sale Securities with Unrealized Losses, 12 Months or More, Fair Value	3,215	0
Available for Sale Securities with Unrealized Losses, 12 Months or More, Unrealized Losses	(39)	0
Available for Sale Securities with Unrealized Losses, Fair Value	25,660	16,719
Available for Sale Securities with Unrealized Losses, Unrealized Losses	(218)	(235)
Collateralized Mortgage Obligations [Member]
Note 2 - Securities (Details) - Securities with Unrealized Losses not Recognized in Income [Line Items]
Available for Sale Securities with Unrealized Losses, Less than 12 Months, Fair Value	6,454	4,132
Available for Sale Securities with Unrealized Losses, Less than 12 Months, Unrealized Losses	(35)	(35)
Available for Sale Securities with Unrealized Losses, 12 Months or More, Fair Value	3,445	8,246
Available for Sale Securities with Unrealized Losses, 12 Months or More, Unrealized Losses	(30)	(65)
Available for Sale Securities with Unrealized Losses, Fair Value	9,899	12,378
Available for Sale Securities with Unrealized Losses, Unrealized Losses	$ (65)	$ (100)