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Defined Contribution Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Feb. 28, 2018 | Feb. 28, 2017 | Feb. 29, 2016
Defined Contribution Plans |  |  |
Total matching contributions to saving plans | $ 3.9 | $ 3.2 | $ 3.1

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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