Indebtedness - Debt Costs - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Mar. 31, 2016
Debt [Line Items]
Reduction of debt	$ 8.0	$ 6.8
Minimum
Debt [Line Items]
Interest coverage ratio	300.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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