Net Income Per Share

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Net Income Per Share

Note O—Net Income Per Share

The calculation of net income per share for the three years ended December 31, 2021, 2020 and 2019, are reflected in the following table (in thousands, except per share amounts):

	Year Ended December 31,
	2021		2020		2019
Net income	$	598,626	$	306,276	$	454,433
Basic:
Weighted average shares	110,482		112,729		115,656
Diluted:
Weighted average shares	110,482		112,729		115,656
Dilutive effect of potential common shares	1,236		589		755
Diluted weighted average shares	111,718		113,318		116,411
Net income per share:
Basic	$	5.42	$	2.72	$	3.93
Diluted	$	5.36	$	2.70	$	3.90

Potential common shares include the dilutive effect of unvested performance-based restricted stock, restricted stock which contains forfeitable rights to dividends, and stock units.