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Derivative Instruments and Hedge Accounting - Fair Value of Derivatives (Detail) - Hedging Instrument - Interest Rate Swap - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2016
Derivatives, Fair Value [Line Items]
Current derivative liabilities	$ 316	$ 511
Non-current derivative liabilities	$ 467	$ 1,366

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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