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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Schedule of Reconciliation of Earnings Per Share
The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per share computations for the years ended December 31, 2016, 2015 and 2014 (in thousands, except per share amounts):
 
For the years ended December 31,
 
2016
 
2015
 
2014
 
Numerator  /
net income
 
Denominator /    
shares
 
Numerator  /
net income
 
Denominator / 
shares
 
Numerator  /
net income
 
Denominator / 
shares
Income and shares used in basic calculations
$
255,697

 
84,405

 
$
249,104

 
100,437

 
61,102

 
112,854

Effect of dilutive stock based awards
 
 
 
 
 
 
 
 
 
 
 
Restricted awards
 
 
876

 
 
 
1,955

 
 
 
3,579

Stock options and SARs
 
 
490

 
 
 
316

 
 
 
101

Warrants
 
 
389

 
 
 
214

 
 
 
—

Income and shares used in diluted calculations
$
255,697

 
86,160

 
$
249,104

 
102,922

 
$
61,102

 
116,534

Income attributable to common stockholders
$
255,697

 
 
 
$
249,104

 
 
 
$
61,102

 
 
Basic earnings per common share
 
 
$
3.03

 
 
 
$
2.48

 
 
 
$
0.54

Diluted earnings per common share
 
 
$
2.97

 
 
 
$
2.42

 
 
 
$
0.52