Note 8 - Residential Mortgage-Banking Activities (Details) - Changes in Residential Mortgage-Servicing Rights (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Changes in Residential Mortgage-Servicing Rights [Abstract]
Mortgage-servicing rights portfolio, net of valuation allowance, beginning of period	$ 2,525	$ 2,541	$ 2,584	$ 2,586
Capitalized mortgage-servicing rights	190	238	574	601
Mortgage-servicing rights portfolio amortization and impairment	(193)	(240)	(636)	(648)
Mortgage-servicing rights portfolio, net of valuation allowance, end of period	$ 2,522	$ 2,539	$ 2,522	$ 2,539