Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share Reconciliation [Abstract]

Reconciliation Of Numerators And Denominators Of Basic And Diluted Earnings Per Share

The following table presents a reconciliation of the numerators and denominators of the basic and diluted earnings per share calculations:

	Year Ended December 31,
	2020					2019					2018
	Income (Numerator)		Weighted Shares (Denominator)	Per-Share Amount		Income (Numerator)		Weighted Shares (Denominator)	Per-Share Amount		Loss (Numerator)		Weighted Shares (Denominator)	Per-Share Amount
	(Amounts and numbers in thousands, except per-share data)
Basic EPS
Income (loss) available to common stockholders	$	374,607	55,358	$	6.77	$	320,087	55,351	$	5.78	$	(5,728)	55,335	$	(0.10)
Effect of dilutive securities:
Options	—		—			—		9			—		—
Diluted EPS
Income (loss) available to common stockholders after assumed conversions	$	374,607	55,358	$	6.77	$	320,087	55,360	$	5.78	$	(5,728)	55,335	$	(0.10)