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Earnings per Share (Tables)
9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Composition of Weighted-Average Common Shares (Denominator) Used in Basic and Diluted Earnings Per Share
The following table summarizes the composition of the weighted-average common shares (denominator) used in the basic and diluted earnings per share computations:
For the Three Months Ended September 30,For the Nine Months Ended September 30,
2020201920202019
Weighted average common shares issued113,914,902 113,914,902 113,914,902 113,914,902 
Average treasury stock shares(15,821,469)(15,496,941)(15,761,114)(15,396,215)
Average deferred compensation shares(45,454)(37,411)(41,790)(37,411)
Average unearned nonvested shares(130,883)(113,321)(121,249)(117,737)
Weighted average common shares and common stock equivalents used to calculate basic earnings per share
97,917,096 98,267,229 97,990,749 98,363,539 
Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share
197,545 243,258 188,255 214,837 
Additional common stock equivalents (deferred compensation) used to calculate diluted earnings per share
45,502 37,411 45,502 37,411 
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share
98,160,143 98,547,898 98,224,506 98,615,787 
Per Share Data: Basic Earnings per Share$0.20 $0.27 $0.49 $0.80 
 Diluted Earnings per Share$0.20 $0.27 $0.49 $0.80 
Common Stock Equivalents Not Included in Computation of Diluted Earnings Per Share
The following table shows the number of shares and the price per share related to common stock equivalents that were not included in the computation of diluted earnings per share for the nine months ended September 30 because to do so would have been antidilutive.
20202019
Price RangePrice Range
SharesFromToSharesFromTo
Restricted Stock110,068 $13.72 $15.44 95,054 $12.99 $15.44 
Restricted Stock Units102,844 $12.43 $15.37 24,782 $16.62 $16.62