Note 6 - Comprehensive Income (Details) - Amounts Reclassified Out of Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended					12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Reclassification out of Accumulated Other Comprehensive Income [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jun. 30, 2014 Reclassification out of Accumulated Other Comprehensive Income [Member]	Jun. 30, 2014 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Dec. 31, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized net holding gains on available-for-sale securities					$ 907
Tax effect	636	490	1,333	1,223		(309)	240	(1,758)
Total reclass out of accumulated other comprehensive income, net of tax	$ 2,172	$ 1,894	$ 4,468	$ 4,302		$ 598