Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2016

Summary of the Equity-Based Compensation Expense Included in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss)

The following table shows a summary of the equity-based compensation expense included in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Selling, general and administrative	$	6,409	$	4,324	$	20,306	$	16,038
Cost of sales		1,104		761		3,551		2,821
Research and development		862		592		2,764		2,196
Total equity-based compensation expense	$	8,375	$	5,677	$	26,621	$	21,055

Summary of Stock Option Activity

The following table summarizes the stock option activity (in thousands, except per share amounts):

	Shares			Weighted Average Option Exercise Price Per Share		Weighted Average Remaining Contractual Term in Years		Aggregate Intrinsic Value
Options outstanding as of  June 30, 2016		6,625		$	10.10
Granted		11		$	29.59
Exercised		(234	)	$	7.03
Forfeited		(34	)	$	21.07
Options outstanding as of September 30, 2016		6,368		$	10.19		5.0	$	127,299
Options outstanding as of December 31, 2015		7,458		$	8.81
Granted		385		$	25.08
Exercised		(1,246	)	$	6.93
Forfeited		(229	)	$	8.02
Options outstanding as of September 30, 2016		6,368		$	10.19		5.0	$	127,299
Options exercisable at September 30, 2016		5,497		$	7.49		4.4	$	124,378
Options expected to vest at September 30, 2016		868		$	27.28		8.6	$	2,910

Summary of Exercise Price

The exercise prices of outstanding options at September 30, 2016 were in the following ranges:

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Shares (in thousands)		Weighted Average Remaining Contractual Life (in years)		Weighted Average Exercise Price Per Share		Shares (in thousands)		Weighted Average Exercise Price Per Share
$2.96 to $5.35		380		2.5	$	2.96		380	$	2.96
$5.36 to $5.67		342		5.3	$	5.57		327	$	5.57
$5.68 to $8.54		3,312		4.3	$	5.74		3,312	$	5.74
$8.55 to $8.90		1,032		3.8	$	8.61		1,032	$	8.61
$8.91 to $23.00		462		7.3	$	22.55		426	$	22.91
$23.01 to $33.12		840		8.7	$	28.07		20	$	28.90
$2.96 to $33.12		6,368		5.0	$	10.19		5,497	$	7.49

Summary of Weighted Average Assumptions Used to Estimate Fair Value of Stock Option

The following table presents the weighted average assumptions used to estimate the fair value of stock option awards granted.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Expected option term (in years)		6.0			5.0			6.0			5.6
Risk-free interest rate		1.2	%		1.5	%		1.4	%		1.6	%
Expected volatility		50.0	%		43.0	%		50.0	%		43.0	%
Weighted average exercise price	$	29.59		$	27.69		$	25.08		$	29.38
Weighted average fair value at grant date	$	14.17		$	14.34		$	12.09		$	13.74

Performance Share Units (PSUs) [Member]

Summary of PSU Activity

The following table summarizes the PSU activity (in thousands, except per share data):

	Performance Share Units			Weighted Average Grant Date Fair Value Per Share
Non-vested share units at June 30, 2016		444		$	27.24
Granted		5		$	29.59
Forfeited		(9	)	$	30.76
Non-vested share units at September 30, 2016		440		$	27.20
Non-vested share units at December 31, 2015		175		$	30.76
Granted		274		$	25.05
Forfeited		(9	)	$	30.76
Non-vested share units at September 30, 2016		440		$	27.20

Restricted Stock Units (RSUs) [Member]

Summary of RSU Activity

The following table summarizes the RSU activity (in thousands, except per share data):

	Restricted Stock Units			Weighted Average Grant Date Fair Value Per Share
Non-vested share units at June 30, 2016		2,760		$	26.69
Granted		5		$	29.59
Vested and shares issued		(22	)	$	31.80
Forfeited		(66	)	$	26.49
Non-vested share units at September 30, 2016		2,677		$	26.66
Non-vested share units at December 31, 2015		1,567		$	29.37
Granted		1,628		$	25.05
Vested and shares issued		(370	)	$	30.89
Forfeited		(148	)	$	27.07
Non-vested share units at September 30, 2016		2,677		$	26.66