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Earnings Per Share - Additional Information (Detail) - shares | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Earnings Per Share [Abstract] |  |
Dilutive effects of assumed exercises of stock options (in shares) | 0 | 0

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- References No definition available. + Details
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- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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