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Summary of Option Activity (Parenthetical) (Detail) - $ / shares	3 Months Ended
	Jun. 30, 2015	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Price Per Share, Option exercised	$ 7.50	$ 7.50
Weighted Average Price Per Share, Option forfeited	$ 11.49	11.49
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Price Per Share, Option forfeited		11.49
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Price Per Share, Option forfeited		$ 13.24

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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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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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- Definition

Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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