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Net Income per Common Share
 9 Months Ended
Sep. 30, 2016
Earnings Per Share [Abstract]  
Net Income per Common Share
Net Income per Common Share
The following summarizes the calculation of net income per common share attributable to common shareholders for the three and nine months ended September 30, 2016 and 2015.
 
Three Months Ended    September 30,
 
Nine Months Ended    September 30,
(in thousands, except per share data)
2016
 
2015
 
2016
 
2015
Numerator:
 
 
 
 
 
 
 
Net income
$
29,831

 
$
28,176

 
$
81,682

 
$
71,342

Less: income allocated to unvested restricted shares
(291
)
 
(262
)
 
(855
)
 
(620
)
Net income attributable to common shareholders - basic
29,540

 
27,914

 
80,827

 
70,722

Add: undistributed income attributable to unvested restricted shares - basic
80

 
67

 
216

 
129

Less: undistributed income attributable to unvested restricted shares - diluted
(80
)
 
(67
)
 
(216
)
 
(129
)
Net income attributable to common shareholders - diluted
$
29,540

 
$
27,914

 
$
80,827

 
$
70,722

Denominator:
 
 
 
 
 
 
 
Weighted average shares outstanding - basic
61,015

 
61,998

 
61,405

 
62,204

Dilutive shares - stock options
—

 
—

 
—

 
1

Weighted average shares outstanding - diluted
61,015

 
61,998

 
61,405

 
62,205

Net income per share attributable to common shareholders:
 
 
 
 
 
 
 
Basic
$
0.48

 
$
0.45

 
$
1.32

 
$
1.14

Diluted
$
0.48

 
$
0.45

 
$
1.32

 
$
1.14