Note 8 - Accumulated Other Comprehensive Income (Details) - Tax Effects Allocated to Each Component (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Note 8 - Accumulated Other Comprehensive Income (Details) - Tax Effects Allocated to Each Component [Line Items]
Before Tax Amount	$ (850)	$ 955	$ (7,880)	$ 1,701
Tax Expense (Benefit)	(299)	344	(2,847)	613
Net of Tax Amount	(551)	611	(5,033)	1,088
Change in Accumulated Gain (Loss) on Effective Cash Flow Derivatives [Member]
Note 8 - Accumulated Other Comprehensive Income (Details) - Tax Effects Allocated to Each Component [Line Items]
Before Tax Amount	87	12	448	65
Tax Expense (Benefit)	31	4	161	23
Net of Tax Amount	56	8	287	42
Securities With OTTI Charges During the Period [Member]
Note 8 - Accumulated Other Comprehensive Income (Details) - Tax Effects Allocated to Each Component [Line Items]
Before Tax Amount	(36)	(14)	(129)	(101)
Tax Expense (Benefit)	(13)	(5)	(47)	(36)
Net of Tax Amount	(23)	(9)	(82)	(65)
OTTI Charges Recognized in Net Income [Member]
Note 8 - Accumulated Other Comprehensive Income (Details) - Tax Effects Allocated to Each Component [Line Items]
Before Tax Amount	(9)	(7)	(75)	(84)
Tax Expense (Benefit)	(2)	(3)	(27)	(30)
Net of Tax Amount	(7)	(4)	(48)	(54)
Net Unrealized Losses On Investment Securities With OTTI [Member]
Note 8 - Accumulated Other Comprehensive Income (Details) - Tax Effects Allocated to Each Component [Line Items]
Before Tax Amount	(27)	(7)	(54)	(17)
Tax Expense (Benefit)	(11)	(2)	(20)	(6)
Net of Tax Amount	(16)	(5)	(34)	(11)
Unrealized Holding Gain Arising During the Period [Member]
Note 8 - Accumulated Other Comprehensive Income (Details) - Tax Effects Allocated to Each Component [Line Items]
Before Tax Amount	(914)	974	(8,241)	1,761
Tax Expense (Benefit)	(320)	351	(2,976)	635
Net of Tax Amount	(594)	623	(5,265)	1,126
Reclassification Adjustment for Gain (Loss) Included in Net Income [Member]
Note 8 - Accumulated Other Comprehensive Income (Details) - Tax Effects Allocated to Each Component [Line Items]
Before Tax Amount	(4)	24	33	108
Tax Expense (Benefit)	(1)	9	12	39
Net of Tax Amount	(3)	15	21	69
Net Unrealized Gains on Investment Securities [Member]
Note 8 - Accumulated Other Comprehensive Income (Details) - Tax Effects Allocated to Each Component [Line Items]
Before Tax Amount	(910)	950	(8,274)	1,653
Tax Expense (Benefit)	(319)	342	(2,988)	596
Net of Tax Amount	$ (591)	$ 608	$ (5,286)	$ 1,057