Note 6 - Changes in Accumulated Other Comprehensive Income by Component (Details) - The changes in the balances of each component of accumulated other comprehensive income, net of tax: (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 696
Net current-period other comprehensive loss	(897)	[1]
Ending Balance	(201)	[1]
Other comprehensive loss before reclassification	(586)	[1]
Amounts reclassified from accumulated other comprehensive income	(311)	[1]
Unrealized Gains And Losses Available For Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	691
Net current-period other comprehensive loss	(807)	[1]
Ending Balance	(116)	[1]
Other comprehensive loss before reclassification	(498)	[1]
Amounts reclassified from accumulated other comprehensive income	(309)	[1]
Unrealized Gains And Losses On Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	5
Net current-period other comprehensive loss	(90)	[1]
Ending Balance	(85)	[1]
Other comprehensive loss before reclassification	(88)	[1]
Amounts reclassified from accumulated other comprehensive income	$ (2)	[1]

[1] Amounts in parentheses represent reductions to accumulated other comprehensive income.