Stock-Based Awards and Other Equity Instruments (Tables)

12 Months Ended

Dec. 31, 2014

The following table presents a summary of our stock option activity:


	Options			Weighted Average Exercise Price		Remaining Contractual Life		Aggregate Intrinsic Value
	(In thousands)					(In years)		(In thousands)
Balance as of January 1, 2012		14,798		$	17.96
Granted		5,586			36.36
Exercised		(3,582	)		13.31
Cancelled		(1,566	)		23.47

Balance as of December 31, 2012		15,236			25.24
Granted		4,016			65.29
Exercised		(2,730	)		18.10
Cancelled		(1,095	)		37.87

Balance as of December 31, 2013		15,427			36.03
Granted		4,113			78.70
Exercised		(3,804	)		25.66
Cancelled		(1,301	)		53.69

Balance as of December 31, 2014		14,435			49.33		4.1	$	520,360

Exercisable as of December 31, 2014		5,636			30.92		2.4		306,808

Vested and expected to vest after December 31, 2014		10,985			51.90		4.9		368,851

Weighted Average Assumptions of Black-Scholes Option-Pricing Model

The fair value of stock options granted during the years ended December 31, 2014, 2013 and 2012 were estimated at the date of grant using the Black-Scholes option-pricing model, assuming the following weighted average assumptions:


	2014			2013			2012
Risk-free interest rate		1.13	%		0.71	%		0.64	%
Expected volatility		42.97	%		44.81	%		53.13	%
Expected life (in years)		4.04			4.07			4.00
Dividend yield		0.76	%		0.80	%		1.04	%
Weighted-average estimated fair value of options granted during the year	$	25.80		$	21.96		$	13.96

Summary of Restricted Stock Units Activity

The following table presents a summary of RSU activity:


	RSUs			Weighted Average Grant-Date Fair Value
	(In thousands)
Balance as of January 1, 2012		2,282			21.47
Granted		602			32.07
Vested and released		(1,382	)		21.02
Cancelled		(284	)		22.82

Balance as of December 31, 2012		1,218			29.57
Granted		216			63.04
Vested and released		(480	)		23.29
Cancelled		(522	)		86.10

Balance as of December 31, 2013		432			50.64
Granted		108			80.94
Vested and released		(159	)		45.90
Cancelled		(44	)		55.52

Balance as of December 31, 2014		337			61.97