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Net Income Per Share
3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Net Income per Share
7.
Net Income per Share

We utilize the two-class method to compute net income per share. The two-class method allocates a portion of net income to participating securities, which include unvested awards of share-based payments with non-forfeitable rights to receive dividends. Net income allocated to unvested share-based payments is excluded from net income allocated to common shares. Any undistributed losses resulting from dividends exceeding net income are not allocated to participating securities. Basic net income per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the period, plus the dilutive effect of outstanding stock options.

The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations:
 
 
Three Months Ended 
 March 31,
 
 
2017
 
2016
 
(in thousands)
 
 
 
 
 
Net income
 
$
35,628

 
$
32,693

Less distributed and undistributed earnings allocated to participating securities
 
(781
)
 
(664
)
Net income allocated to common shares
 
$
34,847

 
$
32,029

 
 
 
 
 
Weighted average common shares outstanding
 
20,565

 
20,972

Incremental shares from assumed LTIP awards and conversions of common stock options
 
101

 
6

Adjusted weighted average common shares outstanding
 
20,666

 
20,978