Equity Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation Expense and Related Income Tax Benefit

The stock-based compensation expense and related income tax benefit recognized in our Condensed Consolidated Statements of Income in the periods indicated were as follows:


	Three Months Ended March 31,
	2013			2012
Stock-based compensation expense	$	3,093		$	4,483
Income tax (benefit)	($	1,191	)	($	1,726	)

Stock Options Granted, Forfeited, Exercised and Expired

The stock options granted, forfeited, exercised and expired in the period indicated were as follows:


	Three Months Ended March 31, 2013
				Weighted					Weighted
				Average		Aggregate			Average		Aggregate
	# of			Exercise		Exercise			Remaining		Intrinsic
	Shares			Price		Price			Contractual Term		Value ⁽¹⁾
Outstanding at beginning of period		1,574,604		$	84.90	$	133,691
Granted		0		$	0		0
Forfeited		(2,667	)	$	74.99		(200	)
Exercised		0		$	0		0
Expired		(197,244	)	$	47.59		(9,387	)

Outstanding at end of period		1,374,693		$	90.28	$	124,104			3.1	$	0

Exercisable at end of period		1,225,187		$	92.37	$	113,170			2.8	$	0

Stock Options Granted and Exercised

The following table sets forth information regarding the stock options granted and exercised in the periods indicated:


	Three Months Ended March 31,
	2013		2012
Shares subject to stock options granted		0		156,500
Weighted average grant date fair value per share	$	0	$	31.36
Shares subject to stock options exercised		0		104,054
Intrinsic value of stock options exercised	$	0	$	2,489
Proceeds received from stock options exercised	$	0	$	4,668
Tax benefits realized from stock options exercised	$	0	$	864

Assumptions used to Estimate Grant Date Fair Value of Stock Options

The fair value of each stock option grant was estimated on the date of grant using the following assumptions:


	Three Months Ended March 31,
	2013	2012
Risk-free interest rates	Not applicable		0.7	%
Expected lives (in years)	Not applicable		4.5
Volatility	Not applicable		51	%
Dividend yield	Not applicable		None

Number of RSUs Granted, Forfeited and Vested

The following table sets forth the number of RSUs that were granted, forfeited and vested in the period indicated:


	Three Months Ended March 31, 2013
	# of RSUs			Weighted Average Grant Date Fair Value
Unvested at beginning of period		413,645		$	75.35
Granted		0		$	0.00
Forfeited		(13,050	)	$	73.68
Vested		(59,430	)	$	87.66

Unvested at end of period		341,165		$	73.27