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Note 13 - Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

		Stock Options Outstanding								Stock Awards Outstanding								Stock Units Outstanding
		Number of Shares (000)				Weighted Average Exercise Price				Number of Shares (000)				Weighted Average Exercise Price				Number of Shares (000)				Weighted Average Exercise Price
Balance, December 31, 2013			185			$	27.04				145			$	26.00				--			$	--
Granted			--				--				134				37.51				--				--
Stock Options Exercised			(65	)			25.86				--				--				--				--
Stock Awards/Units Vested			--				--				(51	)			30.62				--				--
Forfeited/Expired			--				--				(1	)			26.54				--				--
Balance, December 31, 2014			120				27.72				227				31.88				--				--
Granted			375				44.69				95				43.45				20				37.15
Stock Options Exercised			(71	)			22.57				--				--				--				--
Stock Options from Acquisitions			66				20.43				--				--				--				--
Stock Awards/Units Vested			--				--				(131	)			34.77				--				--
Forfeited/Expired			(5	)			24.49				(20	)			35.36				--				--
Balance, December 31, 2015			485				40.62				171				35.65				20				37.15
Granted			58				47.02				136				46.92				108				46.95
Stock Options Exercised			(64	)			30.28				--				--				--				--
Stock Awards/Units Vested			--				--				(159	)			41.91				(12	)			45.54
Forfeited/Expired			(6	)			35.05				(9	)			43.70				(3	)			47.02
Balance, December 31, 2016			473			$	42.85				139			$	40.96				113			$	45.40
Exercisable, December 31, 2016			322			$	41.82

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

				Options Outstanding												Options Exercisable
Range of Exercise Prices				Number of Shares (000)				Weighted Average Remaining Contractual Life (Years)				Weighted Average Exercise Price				Number of Shares (000)				Weighted Average Exercise Price
$17.55	-	$21.29			13				4.58			$	19.93				8			$	19.58
21.51	-	21.51			2				3.05				21.51				2				21.51
28.42	-	28.42			18				0.38				28.42				18				28.42
30.31	-	30.31			26				1.35				30.31				26				30.31
40.57	-	40.57			41				8.00				40.57				40				40.57
40.72	-	40.72			2				7.88				40.72				1				40.72
44.40	-	44.40			52				8.23				44.40				24				44.40
45.50	-	45.50			258				8.61				45.50				200				45.50
47.02	-	47.02			58				9.05				47.02				--				--
48.13	-	48.13			3				8.71				48.13				3				48.13
$17.55	-	$48.13			473				7.72			$	42.84				322			$	41.82

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

		Year Ended December 31, 2016				Year Ended December 31, 2015
Expected dividend yield			1.96	%			2.06	%
Expected stock price volatility			27.34	%			16.96	%
Risk-free interest rate			2.01	%			2.17	%
Expected life of options			7 years				10 years

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