Stock-Based Compensation - Narrative (Details) - shares		6 Months Ended
	Jan. 01, 2017	Jun. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, granted (in shares)		576,000
2014 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance under the plan (in shares)			2,080,000
Additional shares authorized under the plan, percentage increase		4.50%
Automatic annual increase in shares	1,819,000
Shares transferred from the previous plan that expired or terminated (in shares)		66,000
Shares allocated for issuance (in shares)		7,297,000
Common stock, granted (in shares)		2,628,000
Shares available for future issuance under the plan (in shares)		2,987,000
2007 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance under the plan (in shares)		0
Restricted Stock Units (RSUs) | 2014 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance under the plan (in shares)		1,979,000
Shares transferred from the previous plan that expired or terminated (in shares)		297,000