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Investments (Available-for-sale Securities) (Details) $ in Millions	3 Months Ended
	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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- References

No definition available.

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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

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