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Share-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of stock option activity, weighted average exercise prices and options outstanding
A summary of the stock option activity, weighted average exercise prices and options outstanding as of September 30, 2017 and 2016 is as follows:
 
For the nine months ended September 30,
 
 
2017
 
2016
 
 
Common
Stock
Options
 
Weighted
Average
Exercise
Price
 
Common
Stock
Options
 
Weighted
Average
Exercise
Price
 
Outstanding at beginning of period:
2,167

 
$
13.33

 
2,265

 
$
13.16

 
Granted

 
$

 

 
$

 
Exercised
(37
)
 
$
7.39

 
(87
)
 
$
9.83

 
Expired or forfeited

 
$

 

 
$

 
Outstanding at end of period:
2,130

 
$
13.43

 
2,178

 
$
13.29

 
Summary of Company's outstanding, nonvested restricted share units and performance restricted stock units activity
A summary of the Company's Performance Restricted Stock Unit activity is presented below:

 
For the nine months ended September 30, 2017
 
 
Units
 
Weighted
Average
Grant-Date
Fair Value
 
Outstanding at beginning of period:
290

 
$
16.01

 
Granted
128

 
$
20.42

 
Performance condition adjustments
(67
)
 
$
20.55

 
Released
(64
)
 
$
14.87

 
Forfeited

 
$

 
Outstanding at end of period:
287

 
$
17.07

 
 
 
 
 
 
 
 
 
 
 
A summary of the Company's outstanding, non-vested restricted share units is presented below:

 
For the nine months ended September 30,
 
2017
 
2016
 
Units
 
Weighted
Average
Grant-Date
Fair Value
 
Units
 
Weighted
Average
Grant-Date
Fair Value
Outstanding at beginning of period:
569

 
$
20.81

 
595

 
$
18.89

Granted
124

 
$
21.21

 
218

 
$
24.51

Released
(175
)
 
$
20.61

 
(182
)
 
$
19.66

Forfeited
(30
)
 
$
21.21

 
(26
)
 
$
19.24

Outstanding at end of period:
488

 
$
20.97

 
605

 
$
20.68