Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

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

The following is a computation of basic and diluted earnings per common share for the years ended December 31, 2019, 2018 and 2017:  

(in thousands, except per share data)	2019		2018		2017
Net income	$	354,095	$	316,263	$	242,313
Weighted average number of common shares outstanding - basic	220,339		220,280		220,251
Effect of potentially dilutive common shares (1)	311		457		585
Weighted average number of common shares outstanding - diluted	220,650		220,737		220,836
Earnings per common share:
Basic	$	1.61	$	1.44	$	1.10
Diluted	$	1.60	$	1.43	$	1.10

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