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Earnings per Share
9 Months Ended
Sep. 30, 2021
Earnings Per Share [Abstract]  
Earnings per Share Earnings per Share
Basic earnings per share (“EPS”) is calculated by dividing net income by the weighted average number of shares of common stock outstanding. For purposes of calculating basic EPS, vested restricted stock and restricted stock units (“RSUs”) are considered outstanding. Diluted EPS includes the components of basic EPS and also gives effect to dilutive common stock equivalents. The determination of whether components are dilutive is calculated independently for each period. We calculate diluted EPS using the treasury stock method and if-converted method. Under the treasury stock method, diluted EPS reflects the potential dilution that could occur if unvested RSUs result in the issuance of common stock. Under the if-converted method, diluted EPS reflects the potential dilution that could occur if our 9% Debentures result in the issuance of common stock. The determination of potentially issuable shares does not consider the satisfaction of the conversion requirements and the shares are included in the determination of diluted EPS as of the beginning of the period, if dilutive.

Table 6.1 reconciles the numerators and denominators used to calculate basic and diluted EPS.
Earnings per share
Table
6.1
 Three Months Ended September 30,Nine Months Ended September 30,
(In thousands, except per share data)2021202020212020
Basic earnings per share:
Net income$157,977 $130,811 $461,049 $294,663 
Weighted average common shares outstanding - basic335,938 338,598 338,045 340,408 
Basic earnings per share$0.47 $0.39 $1.36 $0.87 
Diluted earnings per share:
Net income$157,977 $130,811 $461,049 $294,663 
Interest expense, net of tax (1):
9% Debentures3,712 4,161 11,135 13,293 
Diluted income available to common shareholders$161,689 $134,972 $472,184 $307,956 
Weighted average common shares outstanding - basic335,938 338,598 338,045 340,408 
Effect of dilutive securities:
Unvested RSUs1,834 1,377 1,651 1,492 
9% Debentures15,785 17,220 15,785 18,489 
Weighted average common shares outstanding - diluted353,557 357,195 355,481 360,389 
Diluted earnings per share$0.46 $0.38 $1.33 $0.85 
(1) Interest expense for the three and nine months ended September 30, 2021 and 2020, respectively, has been tax effected at a rate of 21%.