Earnings per Common Share

The calculation of basic and diluted EPS was as follows:



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands, except per share data)
Basic earnings per Class A common share
Numerator:
Net income	$	29,827	$	19,266	$	99,858	$	60,020
Denominator:
Weighted-average Class A shares issued and outstanding	52,105		50,013		51,774		50,234
Basic earnings per Class A common share	$	0.57	$	0.39	$	1.93	$	1.19

Diluted earnings per Class A common share
Numerator:
Net income	$	29,827	$	19,266	$	99,858	$	60,020
Denominator:
Weighted-average Class A shares issued and outstanding	52,105		50,013		51,774		50,234
Dilutive potential common shares:
Stock options	343		759		441		706
Restricted stock units	1,236		1,418		1,296		1,368
Performance based restricted stock units	705		259		789		268
Employee stock purchase plan	1		3		1		1
Diluted weighted-average Class A shares issued and outstanding	54,390		52,452		54,301		52,577
Diluted earnings per Class A common share	$	0.55	$	0.37	$	1.84	$	1.14

For the periods presented, we excluded certain restricted stock units and stock options outstanding (as applicable) which could potentially dilute basic EPS in the future, from the computation of diluted EPS as their effect was anti-dilutive. Additionally, we have excluded any performance based restricted stock units for which the performance contingency has not been met as of the end of the period. The following table shows the weighted-average number of shares excluded from the diluted EPS calculation:



	Three Months Ended June 30,		Six Months Ended June 30,
	2018	2017	2018	2017
	(In thousands)
Class A common stock
Options to purchase Class A common stock	—	56	—	73
Performance based restricted stock units	134	424	101	216
Total options and restricted stock units	134	480	101	289