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Defined Contribution Plan
12 Months Ended
Dec. 31, 2016
Defined Contribution Plan [Abstract]  
Defined Contribution Plan
14. Defined Contribution Plan

The Company has several 401(k) profit sharing plans covering all employees with three months of service. For certain plans, the Company makes matching contributions. The Company may also make discretionary contributions of up to 50% of employee contributions. The Company did not make any discretionary contributions for the years ended December 31, 2016, 2015 and 2014. The Company matching contributions totaled $1.1 million, $0.9 million and $0.7 million, respectively, for the years ended December 31, 2016, 2015 and 2014.