Note 9 - Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2012

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 Price	Number Outstanding at 12/31/2012 (in thousands)		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (yrs)		Weighted Average Exercise Price		Number Exercisable at 12/31/2012 (in thousands)		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (yrs)		Weighted Average Exercise Price
$40 – 45		297	$	265		3.0	$	42		297	$	265		3.0	$	42
45 – 50		854		—		4.7		48		580		—		2.6		49
50 – 55		935		—		4.8		52		768		—		4.1		52
55 – 60		242		—		7.0		57		162		—		6.9		57
$40 - 60		2,328	$	265		4.8		50		1,807	$	265		3.7		50

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

For the twelve months ended December 31,	2012			2011			2010
Expected volatility*1		21	%		18	%		17	%
Expected life in years*2		4.8			4.7			4.5
Risk-free interest rate*3		0.72	%		1.83	%		2.15	%
Expected dividend yield		3.20	%		3.14	%		2.44	%
Fair value per award	$	5.61		$	5.55		$	6.77

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

	Shares (In Thousands)			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (years)
Outstanding at January 1, 2012		2,276		$	49.34
Granted		296			45.93
Exercised		(185	)		41.18
Forfeited or expired		(59	)		50.43
Outstanding at December 31, 2012		2,328			49.53		4.8
Exercisable at December 31, 2012		1,807			49.65		3.7

Schedule Of Nonvested Option Activity [Table Text Block]

	Shares (In Thousands)			Weighted Average Grant Date Fair Value
Nonvested at January 1, 2012		513
Granted		296
Vested		(245	)
Forfeited		(43	)
Nonvested at December 31, 2012		521		$	5.77

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

	2012			2011
Outstanding at January 1,		50			55
Granted		20			20
Issued upon vesting		(15	)		(24	)
Forfeited		(1	)		(1	)
Outstanding at December 31,		54			50