Note 5 - Securities (Details) - Held to Maturity Securities (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Held to Maturity:
Amortized Costs	$ 162,956	$ 163,983
Gross Unrealized Gains	6,083	3,304
Gross Unrealized Losses	2,857	7,950
Fair Values	166,182	159,337
US Government Agencies [Member]
Held to Maturity:
Amortized Costs	17,935	13,973
Gross Unrealized Gains	321	280
Gross Unrealized Losses	834	1,448
Fair Values	17,422	12,805
States And Political Subdivisions [Member]
Held to Maturity:
Amortized Costs	143,150	149,490
Gross Unrealized Gains	5,705	2,971
Gross Unrealized Losses	2,020	6,502
Fair Values	146,835	145,959
Mortgage-backed Securities [Member]
Held to Maturity:
Amortized Costs	461	520
Gross Unrealized Gains	56	53
Fair Values	517	573
Corporate Securities [Member]
Held to Maturity:
Amortized Costs	1,410
Gross Unrealized Gains	1
Gross Unrealized Losses	3
Fair Values	$ 1,408