Equity Compensation (Tables)

6 Months Ended

Jun. 30, 2011

Equity Compensation

Schedule Of Stock-Based Compensation Expense And Related Income Tax Benefit Recognized In Condensed Consolidated Statements Of Income

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Stock-based compensation expense		$4,758		$4,186		$8,672		$8,999
Income tax (benefit)		($1,832)		($1,612)		($3,339)		($3,465)

Stock Options Granted, Forfeited, Exercised and Expired

	Six Months Ended June 30, 2011
	# of Shares		Weighted Average Exercise Price		Aggregate Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
Outstanding at beginning of period		1,724,791		$77.95		$134,447
Granted		159,500		$69.43		11,074
Forfeited		0		$0		0
Exercised		(103,310)		$48.23		(4,983)
Expired		0		$0		0
Outstanding at end of period		1,780,981		$78.91		$140,538	4.0		$0
Exercisable at end of period		1,334,800		$72.13		$96,273	3.3		$8,162

Stock Options Granted and Exercised

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Shares subject to stock options granted		0		0		159,500		305,000
Weighted average grant date fair value per share		$0		$0		$28.90		$43.59
Shares subject to stock options exercised		42,780		39,200		103,310		71,329
Intrinsic value of stock options exercised		$1,659		$2,742		$2,570		$5,172
Proceeds received from stock options exercised		$1,955		$1,594		$4,983		$2,620
Tax benefits realized from stock options exercised		$638		$1,019		$989		$1,942

Fair Value of Stock Option Grant

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Risk-free interest rates		Not applicable		Not applicable		1.8%		2.2%
Expected lives (in years)		Not applicable		Not applicable		4.7		4.6
Volatility		Not applicable		Not applicable		48%		43%
Dividend yield		Not applicable		Not applicable		None		None

Number of Restricted Stock Units Granted, Forfeited and Vested

	Six Months Ended June 30, 2011
	# of RSUs		Weighted Average Grant Date Fair Value
Unvested at beginning of period		128,803		$99.22
Granted		247,783		$69.97
Forfeited		(9,717)		$77.94
Vested		(34,418)		$81.96
Unvested at end of period		332,451		$79.83