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Income Per Share of Common Stock - Schedule of Diluted Weighted-Average Number of Common and Common Equivalent Shares Adjustments for Potential Dilution of Share-Based Awards Outstanding (Detail) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Numerator: |  |
Net income attributable to MGM Resorts International | $ 31,297 | $ 223,444
Adjustment related to redeemable noncontrolling interests | (3,825) | (4,598)
Net income available to common stockholders - basic | 27,472 | 218,846
Potentially dilutive effect due to MGP and MGM China stock compensation plans | (52) | (165)
Net income attributable to common stockholders - diluted | $ 27,420 | $ 218,681
Denominator: |  |
Weighted-average common shares outstanding - basic | 534,219 | 564,832
Potential dilution from share-based awards | 3,287 | 7,138
Weighted-average common and common equivalent shares - diluted | 537,506 | 571,970
Antidilutive share-based awards excluded from the calculation of diluted earnings per share | 1,929 | 170

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- Definition Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of stock options or restrictive stock units (RSUs). + 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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