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Share-based compensation (Tables)
 12 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of stock option activity
A summary of the stock option activity under our stock plan and related information for the years ended December 31, 2013, 2012, and 2011 follows:
 
 
Number of Stock Options
 
Intrinsic Value of Options Exercised
Outstanding at December 31, 2010
 
51,950

 
 
Granted
 
—

 
 
Exercised
 
(48,350
)
 
$
1,213,102

Forfeited
 
—

 
 
Outstanding at December 31, 2011
 
3,600

 
 
Granted
 
—

 
 
Exercised
 
(3,600
)
 
$
94,968

Forfeited
 
—

 
 
Outstanding at December 31, 2012
 
—

 
 
Granted
 
—

 
 
Outstanding at December 31, 2013
 
—

 
 
Schedule of nonvested share award activity
A summary of the share awards activity under our stock plan and related information for the years ended December 31, 2013, 2012, and 2011 follows:
 
 
 
 
Number of Share Awards
 
Weighted Average
Grant Date
Fair Value Per Share
Outstanding at December 31, 2010
 
 
 
489,010

 
$
67.27

Granted
 
 
 
333,479

 
$
75.32

Vested
 
 
 
(269,076
)
 
$
69.52

Forfeited
 
 
 
(2,650
)
 
$
69.03

Outstanding at December 31, 2011
 
 
 
550,763

 
$
71.04

Granted
 
 
 
310,240

 
$
72.85

Vested
 
 
 
(297,669
)
 
$
68.52

Forfeited
 
 
 
(2,266
)
 
$
74.30

Outstanding at December 31, 2012
 
 
 
561,068

 
$
73.37

Granted
 
 
 
338,915

 
$
63.74

Vested
 
 
 
(323,594
)
 
$
71.78

Forfeited
 
 
 
(6,616
)
 
$
72.96

Outstanding/Weighted Average at December 31, 2013
 
 
 
569,773

 
$
68.54

 
 
 
 
 
 
 
 
 
Year Ended December 31,
(In thousands)
 
2013
 
2012
 
2011
Total fair value of share awards vested
 
$
23,228

 
$
20,396

 
$
18,706

Total compensation recognized for awards, net of capitalization
 
$
15,552

 
$
14,160

 
$
11,755

Capitalized stock compensation
 
$
8,193

 
$
7,768

 
$
8,514