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Earnings Per Share - Additional Information (Detail) - $ / shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Reduction in earnings per share basic and diluted |  |  |  | $ 0.01
Anti-dilutive common stock equivalents excluded from calculation of diluted earnings per share | 1,951,683 | 778,862 | 1,780,397 | 2,155,219
ASU 2016-09 [Member] |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Decrease in earnings per share basic and diluted |  |  | $ 0.01 |

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- 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 + Details
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- Definition 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. + References No definition available. + Details
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- Definition Decrease in earnings per share basic and diluted. + References No definition available. + Details
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- Definition Reduction in basic and diluted EPS due to allocation of income to participating securities. + References No definition available. + Details
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- Details
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