Summarized Financial Information for Joint Venture Unconsolidated (Detail) - Joint Venture [Member] - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017
Related Party Transaction [Line Items]
Revenues	$ 56,340	$ 49,776
Gross Margin	21,312	17,337
Earnings Before Income Taxes	19,917	$ 16,138
Current Assets	75,940		$ 73,767
Non-Current Assets	47,184		42,337
Current Liabilities	$ 18,944		$ 22,293

The amount of current assets reported by an equity method investment of the entity.

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The amount of current liabilities reported by an equity method investment of the entity.

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The amount of gross profit (loss) reported by an equity method investment of the entity.

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Amount of income (loss) from continuing operations reported by an equity method investee.

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The amount of noncurrent assets reported by an equity method investment of the entity.

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The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

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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.

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