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Earnings Per Share - Additional Information (Detail) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Reduction in basic earnings per share			$ 0.01
Anti-dilutive common stock equivalents excluded from calculation of diluted earnings per share	337,682	516,630	1,745,469	909,118
ASU 2016-09 [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Decrease in earnings per share basic			$ 0.01

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

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+ References

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- Definition

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+ References

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- Definition

Reduction in basic EPS due to allocation of income to participating securities.

+ References

No definition available.

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