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Note 12 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

		2015								2014								2013
		Shares				Weighted Average Fair Value				Shares				Weighted Average Fair Value				Shares				Weighted Average Fair Value
Nonvested at beginning of year			101,490			$	20.13				63,800			$	14.30				66,100			$	14.30
Granted			65,933				25.14				101,490				20.13				0			NA
Vested			(4,666	)			20.13				(63,300	)			14.30				0			NA
Forfeited			(7,256	)			20.13				(500	)			14.30				(2,300	)			14.30
Nonvested at end of year			155,501			$	22.25				101,490			$	20.13				63,800			$	14.30

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

		2015								2014								2013
		Shares				Weighted Average Exercise Price				Shares				Weighted Average Exercise Price				Shares				Weighted Average Exercise Price
Outstanding at beginning of year			35,335			$	31.09				60,876			$	33.11				152,896			$	26.15
Granted			4,200				27.66				6,488				22.15				0			NA
Exercised			(2,700	)			6.21				(2,845	)			17.74				(51,055	)			13.72
Forfeited or expired			(26,147	)			35.88				(29,184	)			34.60				(40,965	)			31.30
Outstanding at end of year			10,688			$	24.32				35,335			$	31.09				60,876			$	33.11
Options exercisable at year-end			0			$	NA				28,847			$	33.11				60,876			$	33.11

		2015								2014
		Shares				Weighted Average Exercise Price				Shares				Weighted Average Exercise Price
Outstanding at beginning of year			217,982			$	14.89				0			$	NA
Granted			0			NA					0			NA
Replaced as part of merger			0			NA					282,178				15.48
Exercised			(56,417	)			15.50				(27,740	)			8.34
Forfeited or expired			(37,678	)			21.39				(36,456	)			24.46
Outstanding at end of year			123,887			$	12.64				217,982			$	14.89
Options exercisable at year-end			123,887			$	12.64				210,777			$	15.22

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		2015				2014
Risk-free interest rate			1.67	%			1.56	%
Expected option life (Years)			5				5
Expected stock price volatility			29	%			26	%
Dividend yield			2.5	%			2.5	%

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

		Outstanding													Exercisable
						Weighted Average				Weighted								Weighted
Range of						Remaining				Average								Average
Exercise						Contractual				Exercise								Exercise
Prices		Number				Life (Years)				Price					Number			Price
$20.01 - $24.00			6,488				5.9			$	22.15					0		NA
$24.01 - $28.00			4,200				6.9				27.66					0		NA
Outstanding at year end			10,688				6.3			$	24.32					0		NA

		Outstanding									Exercisable
					Weighted Average		Weighted								Weighted
Range of					Remaining		Average								Average
Exercise					Contractual		Exercise								Exercise
Prices		Number			Life (Years)		Price				Number				Price
$ 4.00 - $ 8.00			48,430		3.8		$	6.58				48,430			$	6.58
$ 8.01 - $12.00			18,550		3.9			8.60				18,550				8.60
$12.01 - $16.00			27,350		1.9			16.00				27,350				16.00
$20.01 - $24.00			29,557		0.9			22.00				29,557				22.00
Outstanding at year end			123,887		2.7		$	12.64				123,887			$	12.64

Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans Information Related To Option Outstanding [Table Text Block]

		2015				2014				2013
Minimum exercise price		$	22.15			$	6.21			$	6.21
Maximum exercise price			27.66				35.88				40.28
Average remaining option term (Years)			6.3				2.0				1.4

		2015				2014
Minimum exercise price		$	5.19			$	5.19
Maximum exercise price			22.00				24.46
Average remaining option term (Years)			2.7				3.1

Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Options Information Related To Stock Option Grants And Exercised [Table Text Block]

		2015				2014				2013
Aggregate intrinsic value of stock options exercised		$	36,000			$	11,000			$	408,000
Cash received from stock option exercises			17,000				50,000				289,000
Tax benefit realized from stock option exercises			0				0				0
Weighted average per share fair value of stock options granted		$	4.41				2.72			NA

		2015				2014
Aggregate intrinsic value of stock options exercised		$	420,000			$	333,000
Cash received from stock option exercises			874,000				232,000
Tax benefit realized from stock option exercises			147,000				116,000
Weighted average per share fair value of stock options granted		NA				NA

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