Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 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 June 30,				Six months ended June 30,
	2019		2018		2019		2018
Numerator
Net income	$	39,827	$	30,418	$	71,466	$	53,912
Less: net income attributable to non-controlling interests	4,983		4,544		9,213		8,157
Net income attributable to Planet Fitness, Inc.	$	34,844	$	25,874	$	62,253	$	45,755
Denominator
Weighted-average shares of Class A common stock outstanding - basic	84,142,975		87,693,377		83,975,192		87,564,596
Effect of dilutive securities:
Stock options	643,120		389,994		614,050		351,987
Restricted stock units	49,088		21,960		49,408		14,886
Weighted-average shares of Class A common stock outstanding - diluted	84,835,183		88,105,331		84,638,650		87,931,469
Earnings per share of Class A common stock - basic	$	0.41	$	0.30	$	0.74	$	0.52
Earnings per share of Class A common stock - diluted	$	0.41	$	0.29	$	0.74	$	0.52