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Earnings per Share (Tables)
 3 Months Ended
Mar. 31, 2019
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 March 31,
 
2019
 
2018
Weighted average common shares issued
113,914,902

 
113,914,902

Average treasury stock shares
(15,291,253
)
 
(16,369,144
)
Average deferred compensation shares
(37,411
)
 
(37,411
)
Average unearned nonvested shares
(107,197
)
 
(75,210
)
Weighted average common shares and common stock equivalents used to calculate basic earnings per share
98,479,041

 
97,433,137

Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share
190,375

 
130,614

Additional common stock equivalents (deferred compensation) used to calculate diluted earnings per share
37,411

 
37,411

Weighted average common shares and common stock equivalents used to calculate diluted earnings per share
98,706,827

 
97,601,162

Basic Earnings per Share
$
0.25

 
$
0.24

Diluted Earnings per Share
$
0.25

 
$
0.24
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 three months ended March 31 because to do so would have been antidilutive.
 
2019
 
2018
 
 
 
Price Range
 
 
 
Price Range
 
Shares
 
From
 
To
 
Shares
 
From
 
To
Restricted Stock
95,403

 
$
12.99

 
$
14.49

 
37,298

 
$
9.84

 
$
14.49

Restricted Stock Units
39,618

 
$
14.22

 
$
16.62

 
43,067

 
$
13.25

 
$
15.83