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Basis of Presentation and New Accounting Pronouncements - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
ASU 2016-09
Basis Of Presentation And New Accounting Pronouncements [Line Items]
Adjustment to retained earnings for previously unrecognized excess tax benefits on share-based payment awards	$ 1,496

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- Definition

Basis of presentation and new accounting pronouncements.

+ References

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- Definition

Unrecognized excess tax benefits on share-based awards.

+ References

No definition available.

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