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Earnings Per Common Share (Tables)
9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share Basic and Diluted
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
Numerator — basic and diluted
 
 
 
 
 
 
 
Net income
$
60,422

 
$
44,333

 
$
187,665

 
$
126,887

Denominator
 
 
 
 
 
 
 
Weighted average number of common shares outstanding — basic
36,617

 
37,318

 
36,851

 
37,008

Effect of dilutive convertible notes
21

 

 
7

 

Effect of dilutive stock options
471

 
639

 
454

 
500

Effect of dilutive restricted shares
829

 
799

 
795

 
706

Weighted average number of common shares outstanding — diluted
37,938

 
38,756

 
38,107

 
38,214

Earnings per common share — basic
$
1.65

 
$
1.19

 
$
5.09

 
$
3.43

Earnings per common share — diluted
$
1.59

 
$
1.14

 
$
4.92

 
$
3.32

Antidilutive stock options and restricted shares
1

 
4

 
24

 
221