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Note 4 - Mortgage Banking Derivative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Note 4 - Mortgage Banking Derivative (Details) [Line Items]
Derivative, Notional Amount	$ 53,000	$ 30,700	$ 53,000	$ 30,700
Derivative Asset	3,445		3,445
Derivative Liability	245		245		$ 250
Gain on Derivative Instruments, Pretax				47
Other Assets [Member]
Note 4 - Mortgage Banking Derivative (Details) [Line Items]
Derivative Asset	197	34	197	34
Other Liabilities [Member]
Note 4 - Mortgage Banking Derivative (Details) [Line Items]
Derivative Liability	245	18	245	18
Other Noninterest Income [Member]
Note 4 - Mortgage Banking Derivative (Details) [Line Items]
Gain on Derivative Instruments, Pretax	9
Loss on Derivative Instruments, Pretax		194	63
Other Noninterest Income [Member] | Designated as Hedging Instrument [Member]
Note 4 - Mortgage Banking Derivative (Details) [Line Items]
Gain on Derivative Instruments, Pretax		$ 140
Loss on Derivative Instruments, Pretax	$ 327		$ 9	$ 18

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