Note 5 - Securities (Details) - Held to Maturity Securities (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Held to Maturity:
Amortized Costs	$ 162,457	$ 163,983
Gross Unrealized Gains	6,826	3,304
Gross Unrealized Losses	1,874	7,950
Fair Values	167,409	159,337
US Government Agencies [Member]
Held to Maturity:
Amortized Costs	18,928	13,973
Gross Unrealized Gains	307	280
Gross Unrealized Losses	666	1,448
Fair Values	18,569	12,805
States And Political Subdivisions [Member]
Held to Maturity:
Amortized Costs	141,683	149,490
Gross Unrealized Gains	6,465	2,971
Gross Unrealized Losses	1,206	6,502
Fair Values	146,942	145,959
Mortgage-backed Securities [Member]
Held to Maturity:
Amortized Costs	434	520
Gross Unrealized Gains	52	53
Fair Values	486	573
Corporate Securities [Member]
Held to Maturity:
Amortized Costs	1,412
Gross Unrealized Gains	2
Gross Unrealized Losses	2
Fair Values	$ 1,412