Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Stock-Based Compensation [Abstract]

Restricted Stock [TableTextBlock]

	Shares	Weighted Average Grant Date Fair Value/Share
Restricted stock at December 31, 2010	230	$	48.13
Shares granted	111		65.10
Shares vested	(134)		43.01
Shares forfeited	(2)		53.31
Restricted stock at December 31, 2011	205	$	60.60

Stock-Appreciation Rights Activity[Table TextBlock]

	Number of Rights	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 31, 2010	2,473	$	46.65
Granted	331		64.48
Exercised	(459)		38.68
Forfeited	(5)		58.84
Outstanding at December 31, 2011	2,340	$	50.71	7.0 years	$	37,797
Exercisable at December 31, 2011	1,672	$	47.06	6.1 years	$	33,119

Stock-Appreciation Rights Valuation [Table TextBlock]

	Dividend Yield		Expected Volatility		Risk Free Interest Rate		Expected Term	Weighted Avg. Grant Date Fair Value of 1 SAR
December 2011	2.6	%	30.2	%	1.1	%	5.5 Years	$	13.70
December 2010	2.7	%	28.0	%	1.9	%	6 Years	$	12.79
December 2009	3.2	%	26.5	%	3.0	%	7 Years	$	9.83

Performance Shares Valuation [Table TextBlock]

	Stock Price on Measurement Date		Dividend Yield		Expected Volatility		Risk Free Interest Rate		Expected Term	Weighted Avg. Grant Date Fair Value
December 2011	$	64.48	2.4	%	35.9	%	0.4	%	3 Years	$	83.12
December 2010	$	59.95	2.4	%	38.8	%	0.8	%	3 Years	$	80.11
December 2009	$	46.96	3.0	%	38.6	%	1.4	%	3 Years	$	61.81

Stock Option Awards [Table TextBlock]

	Number of Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 31, 2010	1,178	$	43.98
Exercised	(522)		41.99
Canceled	(3)		32.01
Outstanding at December 31, 2011	653	$	45.62	2.5 years	$	13,876
Exercisable at December 31, 2011	653	$	45.62	2.5 years	$	13,876