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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2017
Earnings Per Share [Abstract]  
Computation of Basic and Dilutive Net Income Per Share
The following table presents the computation of basic and diluted earnings per common share for the periods indicated (dollar and share amounts in thousands, except per share amounts):
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
2017
 
2016
 
2017
 
2016
Basic Earnings per Common Share
 
 
 
 
 
 
 
 
Net income attributable to Company
 
$
27,845

 
$
23,268

 
$
61,364

 
$
54,654

Less: Preferred stock dividends
 
(3,225
)
 
(3,225
)
 
(9,675
)
 
(9,675
)
Net income attributable to Company's common stockholders
 
$
24,620

 
$
20,043

 
$
51,689

 
$
44,979

Basic weighted average common shares outstanding
 
111,886

 
109,569

 
111,824

 
109,487

Basic Earnings per Common Share
 
$
0.22

 
$
0.18

 
$
0.46

 
$
0.41

 
 
 
 
 
 
 
 
 
Diluted Earnings per Common Share:
 
 
 
 
 
 
 
 
Net income attributable to Company
 
27,845

 
23,268

 
61,364

 
54,654

Less: Preferred stock dividends
 
(3,225
)
 
(3,225
)
 
(9,675
)
 
(9,675
)
Add back: Interest expense on convertible notes for the period, net of tax
 
2,428

 
—

 
6,982

 
—

Net income attributable to Company's common stockholders
 
$
27,048

 
$
20,043

 
$
58,671

 
$
44,979

Weighted average common shares outstanding
 
111,886

 
109,569

 
111,824

 
109,487

Net effect of assumed convertible notes conversion to common shares
 
19,694

 
—

 
18,107

 
—

Diluted weighted average common shares outstanding
 
131,580

 
109,569

 
129,931

 
109,487

Diluted Earnings per Common Share
 
$
0.21

 
$
0.18

 
$
0.45

 
$
0.41