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NET INCOME PER SHARE (Tables)
 9 Months Ended
Sep. 30, 2016
Earnings Per Share [Abstract]  
Calculation of Basic and Diluted Net Income Per Share
The calculation of basic and diluted net income per share is determined using net income applicable to common stockholders as the numerator and the number of shares included in the denominator as follows (in thousands, except per share amounts):
 
 
 
Three Months Ended
 
Nine Months Ended
 
 
 
September 30,
 
September 30,
 
 
 
2016
 
2015
 
2016
 
2015
 
Basic net income per share:
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income applicable to common stockholders
 
$
33,378
 
$
31,880
 
$
96,433
 
$
71,002
 
Weighted average common shares outstanding
 
 
63,604
 
 
66,524
 
 
64,488
 
 
67,608
 
Basic net income per share
 
$
0.52
 
$
0.48
 
$
1.50
 
$
1.05
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Diluted net income per share:
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income applicable to common stockholders
 
$
33,378
 
$
31,880
 
$
96,433
 
$
71,002
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted average common shares outstanding
 
 
63,604
 
 
66,524
 
 
64,488
 
 
67,608
 
Dilutive shares from assumed conversion of convertible senior notes
 
 
1,172
 
 
611
 
 
743
 
 
1,462
 
Dilutive stock options and restricted stock
 
 
1,256
 
 
907
 
 
1,222
 
 
1,019
 
Diluted weighted average common shares outstanding
 
 
66,032
 
 
68,042
 
 
66,453
 
 
70,089
 
Diluted net income per share
 
$
0.51
 
$
0.47
 
$
1.45
 
$
1.01