Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Computation Of Basic And Diluted Earnings (Loss) Per Common Share

The following is a computation of basic and diluted (loss) earnings per common share for the years ended December 31, 2020, 2019 and 2018:  

(in thousands, except per share data)	2020		2019		2018
Net (loss) income	$	(1,523,420)	$	354,095	$	316,263
Weighted average number of common shares outstanding - basic	220,218		220,339		220,280
Effect of potentially dilutive common shares (1)	—		311		457
Weighted average number of common shares outstanding - diluted	220,218		220,650		220,737
(Loss) earnings per common share:
Basic	$	(6.92)	$	1.61	$	1.44
Diluted	$	(6.92)	$	1.60	$	1.43

(1) Represents the effect of the assumed vesting of non-participating restricted shares based on the treasury stock method.