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Retirement Plans | 12 Months Ended
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Dec. 31, 2016
Retirement Plans [Abstract] |
Retirement Plans | 12. Retirement Plans The Company maintains a 401(k) Retirement Savings Plan for all employees that meet minimum employment criteria. The plan provides that the participants may defer eligible compensation on a pre-tax basis subject to certain Internal Revenue Code maximum amounts. The Company makes matching contributions in amounts equal to 25.0% of the employee's contribution to the plan, up to a maximum of 4.0% of contributed compensation. An additional matching contribution of 12.5%, subject to the same limit on contributed compensation, may be made at the discretion of the Company, based upon the Company's performance. For the years ended December 31, 2016, 2015 and 2014, the Company's expense to the plan was $8.2 million, $6.6 million and $7.1 million, respectively.

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