Defined Contribution Plan |
12 Months Ended |
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Dec. 31, 2018 | |
Defined Contribution Pension And Other Postretirement Plans Disclosure [Abstract] | |
Defined Contribution Plan |
12. Defined Contribution Plan The Company sponsors a retirement plan in which substantially all of its full-time employees in the United States and certain other foreign countries are eligible to participate. Eligible participants may contribute a percentage of their annual compensation to this plan, subject to statutory limitations. The Company recorded $2.9 million, $2.1 million, and $1.5 million as contribution expenses for the years ended December 31, 2018, 2017, and 2016, respectively. |