Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Stock Options Issued Pursuant to Stock Incentive Plans

A summary of stock options issued under the various Stock Incentive Plans previously described and changes is as follows:


	Number of Shares			Weighted- Average Exercise Price ($)		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value of In-the-Money Options ($)
Outstanding, December 31, 2009		3,556,873		$	20.72
Granted		338,950			24.48
Exercised		(235,986	)		13.34
Forfeited		(106,625	)		18.11
Expired		(42,674	)		30.31

Outstanding, December 31, 2010		3,510,538			21.55
Granted		367,202			28.95
Exercised		(361,093	)		12.40
Forfeited		(26,591	)		20.53

Outstanding, December 31, 2011		3,490,056			23.28
Granted		435,367			42.43
Exercised		(847,301	)		19.74
Forfeited		(105,540	)		22.19
Expired		(4,000	)		10.19

Outstanding, December 31, 2012		2,968,582		$	27.15		5.28	$	49,151,503
Exercisable, December 31, 2012		1,840,304		$	24.44		4.49	$	35,426,182

Estimated Fair Value of Options Granted using Black-Scholes Option-Pricing Model with Weighted-Average Assumptions

The fair value of options granted in the respective fiscal years was estimated on the date of grant using the Black-Scholes option-pricing model, a pricing model acceptable under ASC 718, with the following weighted-average assumptions:


	Years Ended December 31,
	2012			2011			2010
Expected life (years)		6.2			5.9			5.9
Risk-free interest rate		0.8	%		1.4	%		2.3	%
Expected volatility		51.4	%		50.6	%		50.8	%
Expected dividend yield		—			—			—

Summary of Nonvested Long-Term Incentive Program Performance Share Awards Outstanding and Changes During Period

A summary of the nonvested LTIP Performance Shares is as follows:


Nonvested LTIP Performance Shares	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested at December 31, 2009		216,150		$	16.52
Granted		207,180			26.29
Forfeited or expired		(25,620	)		16.52
Change in expected attainment for 2009 grants		101,325			16.52

Nonvested at December 31, 2010		499,035			20.57
Granted		237,751			28.94
Forfeited or expired		(36,682	)		18.92
Change in expected attainment for 2009 and 2010 grants		231,468			22.71

Nonvested at December 31, 2011		931,571			23.33
Granted		273,595			42.65
Forfeited or expired		(103,682	)		23.12

Nonvested at December 31, 2012		1,101,484		$	28.14

Restricted share awards (RSAs)

Summary of Nonvested Restricted Share Awards

A summary of nonvested RSAs are as follows:


Nonvested Restricted Share Awards	Restricted Share Awards			Grant Date Fair Value
Nonvested at December 31, 2009		314,548		$	17.94
Granted		25,950			22.19
Vested		(95,014	)		17.81
Forfeited or expired		(53,186	)		18.52

Nonvested at December 31, 2010		192,298			18.42
Granted		6,300			28.95
Vested		(86,325	)		18.31
Forfeited or expired		(12,250	)		17.52

Nonvested at December 31, 2011		100,023			19.29
Granted		56,389			44.81
Vested		(79,299	)		18.72
Forfeited or expired		(7,875	)		16.78

Nonvested at December 31, 2012		69,238		$	41.02

S1 2003 Stock Incentive Plan

Summary of Nonvested Restricted Share Awards

A summary of nonvested Transaction RSAs issued under the S1 2003 Stock Incentive Plan as of December 31, 2012 and changes during the period are as follows:


Nonvested Transaction Restricted Share Awards	Number of Restricted Share Awards			Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2011		—		$	—
Transaction RSAs converted upon acquisition of S1		170,205			35.41
Vested		(100,685	)		35.41
Forfeited		(19,276	)		35.41

Nonvested as of December 31, 2012		50,244		$	35.41