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Share-Based Compensation Plans (Tables)
 9 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of share-based compensation expense included in net income
A summary of share-based compensation expense included in net income is as follows:
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2017
 
2016
 
2017
 
2016
 
(In thousands)
Grants of common shares and options
$
2,945

 
$
2,766

 
$
9,402

 
$
8,818

Capitalized share-based compensation
(405
)
 
(375
)
 
(1,103
)
 
(1,002
)
Share-based compensation expense
$
2,540

 
$
2,391

 
$
8,299

 
$
7,816