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Stock-Based Compensation - Plan details (Details)			12 Months Ended							96 Months Ended
	Jan. 01, 2021 shares	Jan. 01, 2014 shares	Dec. 31, 2021 item $ / shares shares	Dec. 31, 2020 $ / shares shares	Dec. 31, 2019 $ / shares shares	Dec. 31, 2018 shares	Dec. 31, 2017 shares	Dec. 31, 2016 shares	Dec. 31, 2015 shares	Dec. 31, 2021 item $ / shares shares	Nov. 30, 2013 shares
Stock options
Stock-based compensation
Total number of shares of common stock available for issuance			3,597,371	3,346,092	3,975,160					3,597,371
Options granted (in shares)			1,827,234	1,679,324
Information with respect to stock options outstanding
Exercisable options (in shares)			5,576,430	4,668,179	3,950,965					5,576,430
Weighted-average exercise price per share of exercisable options (in dollars per share) | $ / shares			$ 24.15	$ 21.75	$ 17.79					$ 24.15
Weighted average grant date fair value per share of options granted during the year (in dollars per share) | $ / shares			$ 21.65	$ 16.96	$ 20.74
Weighted-average remaining contractual life			6 years 7 months 24 days	7 years	7 years 3 months 25 days
Employee stock purchase plan
Stock-based compensation
Total number of shares of common stock available for issuance											581,286
Initial term of plan			2 years
Second term of plan			2 years
Number of six month purchase periods | item			4							4
Purchase period			6 months
Increase in shares of common stock available for issuance (in shares)		313,545	0	0	0	0	0	0	0
Awards issued under the plan (in shares)										529,852
Employee stock purchase plan | Minimum
Stock-based compensation
Percentage of compensation that employees may withhold to purchase stock at a discount			1.00%							1.00%
Employee stock purchase plan | Maximum
Stock-based compensation
Percentage of compensation that employees may withhold to purchase stock at a discount			15.00%							15.00%
Purchase price as percentage of stock price at the initial offering date			85.00%
Purchase price as percentage of stock price at the purchase date			85.00%
Annual percentage increase in shares of common stock available for issuance			1.00%
Annual increase in shares of common stock available for issuance (in shares)			621,814
Restricted stock units
Stock-based compensation
Restricted stock granted (in shares)			670,700	348,288
The 2010 Plan
Stock-based compensation
Total number of shares of common stock available for issuance			0							0
The 2013 Plan
Stock-based compensation
Total number of shares of common stock available for issuance			13,122,238							13,122,238
Annual percentage increase in shares of common stock available for issuance			4.00%
Increase in shares of common stock available for issuance (in shares)	2,314,937
Awards issued under the plan (in shares)										12,400,073
The 2013 Plan | Restricted stock units
Stock-based compensation
Restricted stock granted (in shares)										1,124,487
The 2013 Plan | Restricted stock units | Minimum
Stock-based compensation
Vesting period			2 years
The 2013 Plan | Restricted stock units | Maximum
Stock-based compensation
Vesting period			3 years

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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