Note 5 - Securities (Details) - Fair Value and Associated Unrealized Losses on Investments (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Note 5 - Securities (Details) - Fair Value and Associated Unrealized Losses on Investments [Line Items]
Fair value, Less than 12 months	$ 89,272	$ 133,081
Unrealized losses, Less than 12 months	(1,914)	(4,454)
Fair value, 12 months or more	17,113	12,937
Unrealized losses, 12 months or more	(861)	(947)
Fair value, total	106,385	146,018
Unrealized losses, total	(2,775)	(5,401)
US Government Agencies Debt Securities [Member]
Note 5 - Securities (Details) - Fair Value and Associated Unrealized Losses on Investments [Line Items]
Fair value, Less than 12 months	1,283	5,446
Unrealized losses, Less than 12 months	(49)	(147)
Fair value, 12 months or more	2,452	819
Unrealized losses, 12 months or more	(172)	(168)
Fair value, total	3,735	6,265
Unrealized losses, total	(221)	(315)
Obligations Of States And Political Subdivisions [Member]
Note 5 - Securities (Details) - Fair Value and Associated Unrealized Losses on Investments [Line Items]
Fair value, Less than 12 months	22,343	29,943
Unrealized losses, Less than 12 months	(547)	(1,578)
Fair value, 12 months or more	8,672	2,727
Unrealized losses, 12 months or more	(399)	(255)
Fair value, total	31,015	32,670
Unrealized losses, total	(946)	(1,833)
Fair value, Less than 12 months	17,957	23,800
Unrealized losses, Less than 12 months	(497)	(1,524)
Fair value, 12 months or more	12,649	7,533
Unrealized losses, 12 months or more	(1,217)	(1,183)
Fair value, total	30,606	31,333
Unrealized losses, total	(1,714)	(2,707)
Residential Mortgage Backed Securities and Collateralized Mortgage Obligations [Member]
Note 5 - Securities (Details) - Fair Value and Associated Unrealized Losses on Investments [Line Items]
Fair value, Less than 12 months	24,835	44,197
Unrealized losses, Less than 12 months	(381)	(1,214)
Fair value, 12 months or more		3,271
Unrealized losses, 12 months or more		(139)
Fair value, total	24,835	47,468
Unrealized losses, total	(381)	(1,353)
Corporate Debt Securities [Member]
Note 5 - Securities (Details) - Fair Value and Associated Unrealized Losses on Investments [Line Items]
Fair value, Less than 12 months	27,728	32,649
Unrealized losses, Less than 12 months	(597)	(792)
Fair value, 12 months or more	500	2,960
Unrealized losses, 12 months or more	(2)	(96)
Fair value, total	28,228	35,609
Unrealized losses, total	(599)	(888)
Commercial Mortgage Backed Securities [Member]
Note 5 - Securities (Details) - Fair Value and Associated Unrealized Losses on Investments [Line Items]
Fair value, Less than 12 months	1,936	5,543
Unrealized losses, Less than 12 months	(50)	(205)
Fair value, 12 months or more	2,597	1,437
Unrealized losses, 12 months or more	(148)	(176)
Fair value, total	4,533	6,980
Unrealized losses, total	(198)	(381)
Other Asset Backed Securities [Member]
Note 5 - Securities (Details) - Fair Value and Associated Unrealized Losses on Investments [Line Items]
Fair value, Less than 12 months	11,147	15,303
Unrealized losses, Less than 12 months	(290)	(518)
Fair value, 12 months or more	2,892	1,723
Unrealized losses, 12 months or more	(140)	(113)
Fair value, total	14,039	17,026
Unrealized losses, total	$ (430)	$ (631)