Note 5 - Securities (Details) - Held to Maturity Securities (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Held to Maturity:
Amortized Costs	$ 165,398	$ 163,983
Gross Unrealized Gains	4,648	3,304
Gross Unrealized Losses	4,941	7,950
Fair Values	165,105	159,337
US Government Agencies [Member]
Held to Maturity:
Amortized Costs	17,940	13,973
Gross Unrealized Gains	298	280
Gross Unrealized Losses	1,187	1,448
Fair Values	17,051	12,805
States and Political Subdivisions [Member]
Held to Maturity:
Amortized Costs	145,565	149,490
Gross Unrealized Gains	4,298	2,971
Gross Unrealized Losses	3,736	6,502
Fair Values	146,127	145,959
Mortgage-backed Securities [Member]
Held to Maturity:
Amortized Costs	484	520
Gross Unrealized Gains	52	53
Fair Values	536	573
Corporate Securities [Member]
Held to Maturity:
Amortized Costs	1,409
Gross Unrealized Losses	18
Fair Values	$ 1,391