Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than 12 Months Estimated Fair Value	$ 164,238	$ 210,707
Less than 12 Months Unrealized Losses	4,469	8,652
12 Months or Greater Estimated Fair Value	39,204	19,019
12 Months or Greater Unrealized Losses	1,505	883
Total Estimated Fair Value	203,442	229,726
Total Unrealized Losses	5,974	9,535
US Government Agencies Debt Securities [Member]
Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than 12 Months Estimated Fair Value	8,624	4,782
Less than 12 Months Unrealized Losses	127	148
Total Estimated Fair Value	8,624	4,782
Total Unrealized Losses	127	148
Residential Mortgage Backed Securities [Member]
Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than 12 Months Estimated Fair Value	129,067	155,475
Less than 12 Months Unrealized Losses	3,548	5,992
12 Months or Greater Estimated Fair Value	31,128	15,658
12 Months or Greater Unrealized Losses	1,134	683
Total Estimated Fair Value	160,195	171,133
Total Unrealized Losses	4,682	6,675
Equity Investment Other [Member]
Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
12 Months or Greater Estimated Fair Value		165
12 Months or Greater Unrealized Losses		12
Total Estimated Fair Value		165
Total Unrealized Losses		12
Municipal Bonds [Member]
Note 3 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items]
Less than 12 Months Estimated Fair Value	26,547	50,450
Less than 12 Months Unrealized Losses	794	2,512
12 Months or Greater Estimated Fair Value	8,076	3,196
12 Months or Greater Unrealized Losses	371	188
Total Estimated Fair Value	34,623	53,646
Total Unrealized Losses	$ 1,165	$ 2,700