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Research and Development Costs	3 Months Ended
Research and Development Costs	Mar. 31, 2018
Research and Development [Abstract]
Research and Development Costs	Research and Development Costs Research and development costs related to software development totaled $2.9 million and $4.2 million for the three months ended March 31, 2018 and 2017, respectively. Research and development costs are included in “Selling, general and administrative expenses” on the Condensed Consolidated Statements of Comprehensive Income.