Note 14 - Derivatives (Details) - Gains (Losses) on Derivatives and Location on Income Statement - Designated as Hedging Instrument [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)		$ (410)	$ 22	$ (997)	$ 1,900
Interest on FHLB [Member] | Active Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	[1]	$ (410)		$ (997)
Interest on FHLB [Member] | Forward Starting Interest Rate Swap One [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	[2]		$ 22		$ 283
Other Noninterest Income [Member] | Forward Starting Interest Rate Swap Two [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	[3]				$ 1,617

[1] Loss represents net settlement recorded during the period on active interest rate swaps.

[2] Gains represent tax adjusted amounts reclassified from accumulated other comprehensive income pertaining to the terminated forward starting interest rate swap.

[3] Gains represent tax adjusted amounts reclassified from accumulated other comprehensive income immediately upon cancellation of forecasted Federal Home Loan Bank of San Francisco borrowings.