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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Net income per share
The following table presents the computations of basic and diluted net earnings per share for the periods indicated:
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
June 30,
 
September 30,
 
September 30,
 
2019
 
2019
 
2018
 
2019
 
2018
 
(Dollars in thousands, except per share data)
Basic Earnings Per Share:
 
 
 
 
 
 
 
 
 
Net earnings
$
110,026

 
$
128,125

 
$
116,287

 
$
350,755

 
$
350,298

Less: Earnings allocated to unvested restricted stock(1)
(1,369
)
 
(1,190
)
 
(1,428
)
 
(3,725
)
 
(3,899
)
Net earnings allocated to common shares
$
108,657

 
$
126,935

 
$
114,859

 
$
347,030

 
$
346,399

 
 
 
 
 
 
 
 
 
 
Weighted-average basic shares and unvested restricted
 
 
 
 
 
 
 
 
 
stock outstanding
119,831

 
120,042

 
123,657

 
120,691

 
125,728

Less: Weighted-average unvested restricted stock
 
 
 
 
 
 
 
 
 
outstanding
(1,622
)
 
(1,462
)
 
(1,537
)
 
(1,480
)
 
(1,473
)
Weighted-average basic shares outstanding
118,209

 
118,580

 
122,120

 
119,211

 
124,255

 
 
 
 
 
 
 
 
 
 
Basic earnings per share
$
0.92

 
$
1.07

 
$
0.94

 
$
2.91

 
$
2.79

 
 
 
 
 
 
 
 
 
 
Diluted Earnings Per Share:
 
 
 
 
 
 
 
 
 
Net earnings allocated to common shares
$
108,657

 
$
126,935

 
$
114,859

 
$
347,030

 
$
346,399

 
 
 
 
 
 
 
 
 
 
Weighted-average diluted shares outstanding
118,209

 
118,580

 
122,120

 
119,211

 
124,255

 
 
 
 
 
 
 
 
 
 
Diluted earnings per share
$
0.92

 
$
1.07

 
$
0.94

 
$
2.91

 
$
2.79


________________________
(1)
Represents cash dividends paid to holders of unvested restricted stock, net of forfeitures, plus undistributed earnings amounts available to holders of unvested restricted stock, if any.