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Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Basic: |  |
Net income attributable to Allegiant Travel Company (in Dollars) | $ (33,009) | $ 57,124
Less: Net income allocated to participating securities (in Dollars) | (236) | (799)
Net income attributable to common stock (in Dollars) | $ (33,245) | $ 56,325
Net income per share, basic (in Dollars per share) | $ (2.08) | $ 3.52
Weighted-average shares outstanding | 15,952,000 | 16,011,000
Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted | $ (236) | $ (798)
Net Income (Loss) Available to Common Stockholders, Diluted | $ (33,245) | $ 56,326
Diluted earnings per share | $ (2.08) | $ 3.52
Weighted Average Number of Shares Outstanding, Diluted | 15,952,000 | 16,013,000
Dilutive effect of stock options, restricted stock and stock-settled stock appreciation rights | 62,000 | 31,000
Adjusted weighted-average shares outstanding under treasury stock method | 16,014,000 | 16,042,000
Participating securities excluded under two-class method | (62,000) | (29,000)
Two-Class Method, Weighted Average Number of Shares Outstanding, Diluted | 15,952,000 | 16,013,000

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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent, and if applicable, reduced by earnings allocated (not distributed) to participating securities under the two-class method to the extent that participating securities may share in earnings as if all of the earnings for the period had been distributed. + References No definition available. + Details
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