Note 11 - Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used

	2012			2011
Risk–free interest rate		0.27	%		2.02	%
Expected volatility		39.0	%		23.7	%
Expected life, in years		2.1			4.8
Expected dividend yield		2.91	%		3.62	%

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

	Number of Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value
Options outstanding at January 1, 2011		472,327		$	43.07	$	–
Options granted		1,264,719			46.58		–
Options exercised		(224,969	)		37.30		–
Options cancelled or expired		(30,000	)		44.25		–
Options outstanding at December 31, 2011		1,482,077			46.92		–
Options granted		64,271			44.26		–
Options exercised		(120,050	)		46.46		–
Options cancelled or expired		(85,620	)		52.50		–
Options outstanding at June 30, 2012		1,340,678		$	46.47	$	502,000
Options exercisable at June 30, 2012		238,407		$	45.78	$	459,000

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

Options Outstanding June 30, 2012	Exercise Prices			Weighted Average Exercise Price	Weighted Average Remaining Contractual Life in Years
58,407	$37.70			$37.70	1.8
1,192,271	$42.99	–	$46.69	$46.53	3.7
90,000	$51.50			$51.50	0.8
1,340,678				$46.47	3.2

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

	Number of Shares			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
Non–vested restricted shares at January 1, 2011		30,000		$	34.46	$	–
Award shares granted		–			–		–
Award shares vested		(6,000	)		34.46		–
Non–vested restricted shares at December 31, 2011		24,000			34.46		–
Award shares granted		–			–		–
Award shares vested		(6,000	)		34.46		–
Non–vested restricted shares at June 30, 2012		18,000		$	34.46	$	194,000