Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Reconciliation of Numerators and Denominators Used to Compute Basic and Diluted Earnings per Share

The following table sets forth reconciliations used to compute basic and diluted earnings per share of Class A common stock:  

	Three months ended March 31,
	2019		2018
Numerator
Net income	$	31,639	$	23,493
Less: net income attributable to non-controlling interests	4,230		3,613
Net income attributable to Planet Fitness, Inc.	$	27,409	$	19,880
Denominator
Weighted-average shares of Class A common stock outstanding - basic	83,805,545		87,434,384
Effect of dilutive securities:
Stock options	569,864		255,527
Restricted stock units	49,866		7,774
Weighted-average shares of Class A common stock outstanding - diluted	84,425,275		87,697,685
Earnings per share of Class A common stock - basic	$	0.33	$	0.23
Earnings per share of Class A common stock - diluted	$	0.32	$	0.23