Equity Incentive Plans - Additional Information (Details) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2016 USD ($) shares	Sep. 30, 2016 USD ($) shares
2007 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	0	0
2011 Executive Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	0	0
2016 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase percentage of shares of all classes of company’s common stock outstanding	5.00%	5.00%
Equity incentive plan description		The total number of shares of Class A common stock reserved for issuance under the 2016 Plan is equal to (1) 3,800,000 shares plus (2) a number of shares of Class A common stock equal to the number of shares of Class B common stock subject to awards granted under the 2007 Plan and the 2011 Plan, or our Existing Plans, that, on or after September 22, 2016 expire or otherwise terminate without having been exercised in full, and a number of shares of Class A common stock equal to the number of shares of Class B common stock issued pursuant to awards granted under our Existing Plans that are forfeited to or repurchased by us, provided that the maximum number of shares of Class A common stock that may be added to the 2016 Plan pursuant to (2) is 11,663,388 shares.
2016 Equity Incentive Plan \| Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	3,800,000	3,800,000
Automatically increase of shares reserved for issuance	5,500,000	5,500,000
2016 Equity Incentive Plan \| Class A Common Stock \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	11,663,388	11,663,388
2016 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase percentage of shares of all classes of company’s common stock outstanding	1.00%	1.00%
Unrecognized compensation cost \| $	$ 23.2	$ 23.2
Weighted-average remaining expected term		3 years 15 days
2016 Employee Stock Purchase Plan \| Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	750,000	750,000
Automatically increase of shares reserved for issuance	1,600,000	1,600,000
Purchase price of common stock, percent		85.00%
Number of shares purchased	0	0
2016 Employee Stock Purchase Plan \| Class A Common Stock \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares purchase price discount rate		15.00%

Common stock capital shares reserved for future issuance annual automatic increase in shares.

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Common stock capital shares reserved for future issuance annual automatic increase percentage.

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Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Discount rate from fair value on offering date that participants pay for shares.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Description of significant modifications (such as a change in expiration dating, vesting rights, or exercise prices) to an equity-based compensation plan, including the terms of the modifications.

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Purchase price of common stock expressed as a percentage of its fair value.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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