Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Summary of Total Stock Based Compensation Expense Included in Condensed Consolidated Statements of Operations and Related Tax Benefits

The following table summarizes the total stock-based compensation expense included in the Condensed Consolidated Statements of Operations and the related tax benefits for the three and six-month periods ended June 30, 2012 and 2011. Stock-based compensation expenses are presented in “Selling and administrative expenses” in the Condensed Consolidated Statements of Operations.

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Total stock-based compensation expense	$	1,825		$	1,928		$	4,145		$	4,262
Income tax benefit		(671	)		(573	)		(1,331	)		(1,232	)

Schedule of Stock Option Activity

A summary of the Company’s stock option activity for the six-month period ended June 30, 2012 is presented in the following table (underlying shares in thousands):

	Shares			Outstanding Weighted- Average Exercise Price (per share)		Aggregate Intrinsic Value		Weighted- Average Remaining Contractual Life
Outstanding at December 31, 2011		746		$	43.47
Granted		207		$	71.18
Exercised		(66	)	$	32.49
Forfeited		(11	)	$	62.89
Expired or canceled		(3	)	$	69.10
Outstanding at June 30, 2012		873		$	50.57	$	9,562		4.5 years
Exercisable at June 30, 2012		513		$	38.42	$	9,031		3.4 years

Other Information About Company's Stock Options

 The following table presents certain other information about the Company’s stock options:

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Weighted-average estimated grant-date fair value of employee stock options granted (per share)	$	20.10			$	25.81
Total pre-tax intrinsic value of stock options exercised	$	303	$	2,903	$	2,489	$	7,435
Pre-tax unrecognized compensation expense, net of estimated forfeitures as of June 30, 2012					$	6,190
Weighted-average period (in years) to be recognized as expense						2.2

Schedule of Weighted-Average Valuation Assumptions

The weighted-average assumptions used for the periods indicated are noted in the table below:

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Assumptions:
Risk-free interest rate		0.6	%		1.4	%		0.7	%		1.9	%
Dividend yield		0.3	%		0.2	%		0.3	%		0.3	%
Volatility factor		43			45			47			44
Expected life (in years)		3.5			3.8			4.1			4.3

Schedule of Restricted Share Award Activity

A summary of the Company’s restricted share award activity for the six-month period ended June 30, 2012 is presented in the following table (underlying shares in thousands):

	Shares			Weighted- Average Grant- Date Fair Value (per share)
Nonvested at December 31, 2011		148		$	48.59
Granted		61		$	68.97
Vested		(57	)	$	26.67
Forfeited		(8	)	$	84.56
Nonvested at June 30, 2012		144		$	63.91

Other Information About Company's Restricted Share Awards

 The following table presents certain other information about the Company’s restricted share awards:

	Six Months Ended June 30,
	2012		2011
Total fair value of awards vested during the period	$	3,705	$	3,035
Pre-tax unrecognized compensation expense, net of estimated forfeitures as of June 30, 2012	$	5,171
Weighted-average period (in years) to be recognized as expense		2.0