Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2022

Earnings Per Share

Summary of basic and diluted earnings per share calculations

	Quarter ended March 31,
	2022		2021
	(in thousands, except per share amounts)
Net income	$	173,593	$	376,868
Weighted average basic shares of common stock outstanding		55,831		69,113
Effect of dilutive securities - shares issuable under stock-based compensation plan		3,298		4,004
Weighted average shares of common stock applicable to diluted earnings per share		59,129		73,117
Basic earnings per share	$	3.11	$	5.45
Diluted earnings per share	$	2.94	$	5.15

Schedule of anti-dilutive shares outstanding

	Quarter ended March 31,
	2022		2021
	(in thousands except for weighted-average exercise price)
Performance-based RSUs (1)		300		120
Time-based RSUs		137		—
Stock options (2)		362		97
Total anti-dilutive units and options		799		217
Weighted average exercise price of anti-dilutive stock options (2)	$	57.71	$	58.85

(1) Certain performance-based RSUs were outstanding but not included in the computation of earnings per share because the performance thresholds included in such RSUs have not been achieved.

(2) Certain stock options were outstanding but not included in the computation of diluted earnings per share because the weighted-average exercise prices were above the average stock prices for the period.