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Benefit Plans	12 Months Ended
Benefit Plans	Dec. 31, 2019
Retirement Benefits [Abstract]
Benefit Plans	Benefit Plans We maintain a contributory defined contribution 401(k) plan for our U.S. employees. We adopted a Safe Harbor Plan effective January 1, 2016, and as a result, company-matched contributions are fully vested. Additional contributory plans are in effect internationally. Our contribution expense for such plans was $6.2 million, $4.8 million and $3.3 million in 2019, 2018 and 2017, respectively.