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Net Income Per Share - Calculation of Net Income Per Share (Detail)
¥ / shares in Units, ¥ in Thousands
12 Months Ended
Dec. 31, 2019
CNY (¥)
¥ / shares
shares
Dec. 31, 2019
$ / shares
Dec. 31, 2018
CNY (¥)
¥ / shares
shares
Dec. 31, 2017
CNY (¥)
¥ / shares
shares
Numerator:        
Net income attributed to ordinary shareholders for computing net income per ordinary share-basic and diluted | ¥ ¥ 2,970,890   ¥ 2,815,775 ¥ 2,148,098
Denominator for computing net income per share-basic:        
Weighted average ordinary shares outstanding used in computing net income per ordinary share-basic 415,316,627   407,009,875 394,549,323
Denominator for computing net income per share-diluted:        
Weighted average shares outstanding used in computing net income per ordinary share-diluted 451,206,091 [1]   433,083,643 415,265,078
Net income per ordinary share attributable to Momo Inc. - basic | (per share) ¥ 7.15 $ 1.03 ¥ 6.92 ¥ 5.44
Net income per ordinary share attributable to Momo Inc. - diluted | (per share) ¥ 6.76 $ 0.97 ¥ 6.59 ¥ 5.17
[1] The calculation of the weighted average number of ordinary shares for the purpose of diluted net income per share has considered the effect of certain potentially dilutive securities. For the year ended December 31, 2016, an incremental weighted average number of 7,155,060 nonvested restricted shares and an incremental weighted average number of 22,550,182 ordinary shares from the assumed exercise of share options and vesting of RSUs using the treasury stock method were included.