Stock Options and Awards (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Assumptions Used in Option Pricing Model

The following table presents the assumptions used in the option pricing model.

	2011			2010
Expected life (years)		6.0			5.8
Volatility		49.5	%		50.1	%
Risk-free interest rate		1.13	%		1.23	%
Dividend yield		0.0	%		0.0	%
Fair value of each option	$	32.38		$	31.76

Schedule of Option Activity

Option activity for the year ended December 31, 2012 was as follows:

	Number of Options			Weighted Average Price		Aggregate intrinsic  value (in millions)		Weighted  Average Remaining Contractual Life (in years)
Outstanding at December 31, 2011		1,085,906		$	49.50
Granted		—			—
Exercised		(280,969	)		38.47
Forfeited		(53,250	)		61.90
Outstanding at December 31,2012		751,687		$	52.74	$	15.3		6.72
Exercisable at December 31,2012		498,878		$	46.46	$	13.3		5.96

Summary of RSA Activity

The Company’s RSA activity and related information is presented below:

	RSA Number of Shares			Weighted Average Grant Date Fair Value Per Share
Nonvested balance at December 31, 2011		60,000		$	69.59
Granted		95,450			69.34
Vested		(18,666	)		69.59
Forfeited		(4,000	)		69.59
Nonvested balance at December 31, 2012		132,784		$	69.41

Schedule Of Assumptions Used In Monte Carlo Simulation

Assumptions used in the Monte Carlo simulation are as follows:

Grant date	October 26, 2012
Performance period	October 1, 2012 to September 30, 2015
Volatility	40.2%
Risk-free interest rate	0.40%
Grant date price	$69.55

Summary of PSA Activity

The Company’s Performance Unit activity and related information is presented below:

	Number  of Performance Units		Weighted Average Grant Date Fair  Value Per Performance Unit
Nonvested balance at December 31, 2011		—	$	—
Granted		46,350		84.66
Vested		—		—
Forfeited		—		—
Nonvested balance at December 31, 2012		46,350	$	84.66

Schedule of Information for Stock Option Plans

The following table summarizes information for equity compensation plans in effect as of December 31, 2012:

	Number of securities to be issued upon exercise of outstanding options(1)		Weighted-average exercise price of outstanding options		Number of  securities remaining available for future issuance under equity compensation plan (excluding  securities reflected in column (a))
Plan category	(a)		(b)		(c)
Equity compensation plans approved by stockholders
Stock options		751,687	$	52.74		871,698
Equity compensation plans not approved by stockholders		—		not applicable		—
Total		751,687	$	52.74		871,698

(1) Excludes 132,784 shares of unvested restricted stock awards and 46,350 of unvested performance units, which were granted pursuant to the 2004 Plan approved by the stockholders.