Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Weighted Average Assumptions Of Fair Value Options Using Black-Scholes Option-Pricing Model

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions for the years ended December 31, 2016, 2015 and 2014:

	December 31,
	2016	2015	2014
Dividend yield	—%	—%	—%
Risk-free interest rate	1.0% – 1.8%	1.3% – 1.7%	1.5% – 1.7%
Expected life (in years)	5.0	5.0	5.0
Historical volatility	46.8% – 48.2%	47.4% – 49.7%	49.6% – 53.7%

Summary Of Stock Option Activity And Weighted Average Exercise Prices

A summary of the Company’s stock option activity and weighted average exercise prices follows:

	Stock Option Activity				Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
	Options (in thousands)		Weighted Average Exercise Price
Balance outstanding at December 31, 2013	9,724		$	10.86
Granted	3,827		11.04
Exercised	(1,098	)	7.10
Cancelled or expired	(1,684	)	12.70
Balance outstanding at December 31, 2014	10,769		$	10.95	7.01	$	38,752
Options vested and expected to vest	9,043		$	10.89	6.69	$	33,566
Options exercisable at December 31, 2014	4,737		$	10.01	5.28	$	22,083
Balance outstanding at December 31, 2014	10,769		$	10.95
Granted	857		10.06
Exercised	(646	)	4.41
Cancelled or expired	(1,837	)	12.22
Balance outstanding at December 31, 2015	9,144		$	11.05	6.66	$	2,117
Options vested and expected to vest	8,356		$	11.08	6.49	$	2,117
Options exercisable at December 31, 2015	5,401		$	10.95	5.60	$	2,117
Balance outstanding at December 31, 2015	9,144		$	11.05
Granted	635		7.32
Exercised	(325	)	5.66
Cancelled or expired	(1,685	)	11.49
Balance outstanding at December 31, 2016	7,769		$	10.88	6.05	$	2,641
Options vested and expected to vest	7,348		$	11.00	5.90	$	2,529
Options exercisable at December 31, 2016	5,580		$	11.31	5.27	$	2,347

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The following table summarizes information about outstanding and vested stock options as of December 31, 2016:

	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number of Shares Outstanding (in thousands)	Weighted-Average Remaining Contractual Life (Years)	Weighted-Average Exercise Price		Number of Shares (in thousands)	Weighted-Average Exercise Price
$1.79 - $7.02	1,006	3.55	$	5.04	839	$	4.79
$7.04 - $9.24	1,340	7.31	8.51		717	8.93
$9.34 - $10.05	864	7.50	9.79		559	9.77
$10.13 - $10.13	977	7.15	10.13		500	10.13
$10.31 - $12.32	891	5.51	11.21		654	11.46
$12.46 - $13.28	1,115	5.13	13.11		969	13.11
$13.34 - $16.98	1,205	6.23	15.27		971	15.70
$17.88 - $17.88	60	5.43	17.88		60	17.88
$18.09 - $18.09	306	5.57	18.09		306	18.09
$18.24 - $18.24	5	5.58	18.24		5	18.24
	7,769	6.05	$	10.88	5,580	$	11.31

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

Restricted Stock Unit Activity

A summary of the Company’s restricted stock units (“RSUs”) activity and weighted average exercise prices follows:

	Restricted Stock Unit Activity
	Number of Shares (in thousands)		Weighted Average Grant Date Fair Value (Per Share)		Aggregate Fair Value (in thousands)
Balance outstanding at December 31, 2014	—		$	—	$	—
Awarded	1,257		10.31		—
Released	—		—		—
Forfeited	(55	)	10.31		8,110
Non-vested and outstanding at December 31, 2015	1,202		$	10.31	$	6,220
Balance outstanding at December 31, 2015	1,202		$	10.31	$	6,220
Awarded	571		6.32		—
Released	(394	)	10.31		—
Forfeited	(191	)	10.01		—
Non-vested and outstanding at December 31, 2016	1,188		$	8.44	$	8,968
Expected to vest	903		$	8.76	$	6,817