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Note 14 - Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]

		Projected Payments
2018		$	18,000
2019			12,000
2020			10,000
2021			2,000
Total		$	42,000

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

		2017				Weighted Average Exercise Price Per Share
Outstanding, January 1			29,324			$	23.67
Expired			(1,337	)			37.48
Exercised			(8,237	)			27.97
Outstanding, December 31			19,750			$	20.94
Exercisable, December 31			19,750			$	20.94

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

						Outstanding												Exercisable
Grant Date		Exercise Price Per Share				Shares				Contractual Average Life				Average Exercise Price Per Share				Shares				Average Exercise Price Per Share
November 10, 2008		$	23.00				12,300				0.85			$	23.00				12,300			$	23.00
May 9, 2011		$	17.55				7,450				3.35			$	17.55				7,450			$	17.55
							19,750												19,750

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

		Units				Weighted Average Grant Date Fair Value Per Share
Nonvested at January 1, 2017			8,995			$	32.93
Granted			5,825			$	38.70
Forfeited			(219	)		$	38.70
Nonvested at December 31, 2017			14,601			$	35.14
Expected to vest at December 31, 2017			14,601			$	35.14

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