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Restricted Cash and Cash Equivalents | 12 Months Ended
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Mar. 31, 2017
Receivables [Abstract] |
Restricted Cash and Cash Equivalents | 4. Restricted Cash and Cash Equivalents Included in restricted cash and cash equivalents is US$5.0 million related to an insurance policy at 31 March 2017 and 2016, which restricts the cash from use for general corporate purposes.

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- References No definition available. + Details
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- Definition The entire disclosure for assets that are restricted in their use, generally by contractual agreements or regulatory requirements. This would include, but not limited to, a description of the restricted assets and the terms of the restriction. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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