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Earnings per Common Share (Tables)
9 Months Ended
Sep. 30, 2016
Earnings Per Share [Abstract]  
Schedule of computation of basic and diluted earnings per common share
The computation of basic and diluted earnings per common share is as follows (in thousands, except share and per share data):
 
For the three months ended September 30,
 
For the nine months ended September 30,
 
2016
 
2015
 
2016
 
2015
Numerator:
 
 
 
 
 
 
 
Net income attributable to common shareholders
$
41,174

 
$
40,594

 
$
124,918

 
$
144,435

Less: Dividends paid on unvested restricted shares
(204
)
 
(346
)
 
(891
)
 
(863
)
Less: Undistributed earnings attributable to unvested restricted shares
(1
)
 

 
(8
)
 
(136
)
Net income attributable to common shareholders excluding amounts attributable to unvested restricted shares
$
40,969

 
$
40,248

 
$
124,019

 
$
143,436

 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Weighted-average number of common shares - basic
123,621,323

 
127,663,480

 
123,635,010

 
129,855,686

Unvested restricted shares
194,210

 
479,674

 
224,743

 
554,927

Unvested performance units
20,919

 

 

 

Weighted-average number of common shares - diluted
123,836,452

 
128,143,154

 
123,859,753

 
130,410,613

 
 
 
 
 
 
 
 
Net income per share attributable to common shareholders - basic
$
0.33

 
$
0.32

 
$
1.00

 
$
1.10

 
 
 
 
 
 
 
 
Net income per share attributable to common shareholders - diluted
$
0.33

 
$
0.31

 
$
1.00

 
$
1.10