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Investments (Available-for-sale Securities) (Details) $ in Millions | 3 Months Ended
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Jun. 30, 2018 USD ($)
Available-for-sale Equity Securities, Amortized Cost Basis [Abstract] |
Unrealized (losses) on available-for-sale-securities | $ (0.9)

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- Definition Amount of unrealized gain (loss) recognized in the income statement on unsold other securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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