Common Stock (Tables)

12 Months Ended

Dec. 31, 2014

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

Schedule of stock option activity

A summary of the transactions within the Company’s stock option plans follows (shares in thousands):

	Shares		Weighted-Average Exercise Price
Outstanding at January 1, 2012	1,536		$	9.30
Granted	1,148		22.17
Exercised	(1,362	)	15.42
Canceled	(34	)	32.26
Outstanding at December 31, 2012	1,288		13.69
Granted	74		53.78
Exercised	(484	)	12.22
Canceled	(3	)	23.63
Outstanding at December 31, 2013	875		17.85
Granted	—		—
Exercised	(213	)	11.21
Canceled	(10	)	19.98
Outstanding at December 31, 2014	652		19.99
Exercisable at December 31, 2012	770		$	10.97
Exercisable at December 31, 2013	684		$	11.67
Exercisable at December 31, 2014	564		$	16.18

Schedule of share authorized under stock option plan, by exercise price range

As of December 31, 2014 (options in thousands):

	Options Outstanding				Options Exercisable
Range of Exercise Prices	Amount Outstanding	Weighted Average Remaining Contractual Life	Weighted Average Exercise Price		Amount Exercisable	Weighted Average Exercise Price
$0.01-5.00	140	4.2	$	3.38	140	$	3.38
5.01-10.00	193	5.2	8.32		193	8.32
10.01-15.00	22	4.1	14.42		22	14.42
15.01-20.00	30	3.8	16.38		30	16.38
25.01-30.00	73	4.6	25.82		52	25.89
30.01-35.00	69	6.2	31.64		69	31.64
40.01-45.00	51	7.1	41.25		34	41.25
50.01-55.00	74	8.2	53.78		24	53.78
	652		$	19.99	564	$	16.18

Summary of options outstanding

The following table presents information associated with options as of December 31, 2014 and 2013, and for the years ended December 31, 2014, 2013 and 2012:

	2014		2013		2012
Intrinsic value of options outstanding as of December 31	$	53	$	53
Intrinsic value of options exercisable as of December 31	48		45
Intrinsic value of options exercised	17		21		33
Weighted-average grant date fair value per option	$	—	$	24.56	$	29.52

Summary of restricted stock units activity

A summary of RSU activity for the year ended December 31, 2014 follows (RSUs in thousands):

	Stock Units		Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2013	763		$	46.06
Granted	805		92.28
Vested	(817	)	71.16
Forfeited	(49	)	63.22
Nonvested as of December 31, 2014	702		$	68.11

A summary of RSUs granted follows (RSUs in thousands):

	Year Ended December 31,
	2014		2013		2012
RSUs granted	805		894		1,216
Weighted-average grant date price per unit	$	92.28	$	57.50	$	43.98