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Research and Development Costs	6 Months Ended
Research and Development Costs	Jun. 30, 2018
Research and Development [Abstract]
Research and Development Costs	Research and Development Costs Research and development costs related to software development in our Technology segment totaled $2.9 million and $5.8 million for the three and six months ended June 30, 2018, respectively, and $4.3 million and $8.5 million for the three and six months ended June 30, 2017, respectively. Research and development costs are included in “Selling, general and administrative expenses” on the Condensed Consolidated Statements of Comprehensive Income.