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Financing Arrangements	9 Months Ended
Financing Arrangements	Dec. 31, 2017
Debt Disclosure [Abstract]
Financing Arrangements	Financing Arrangements The Company had several uncommitted, unsecured bank lines of credit aggregating $62.1 million as of December 31, 2017. There are no financial covenants under these lines of credit with which the Company must comply. As of December 31, 2017, the Company had outstanding bank guarantees of $44.2 million under these lines of credit. There was no borrowing outstanding under these lines of credit as of December 31, 2017 or March 31, 2017.