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Equity Awards (Tables)
 9 Months Ended
Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity
Information related to stock options at September 30, 2015 is as follows:
 
 
Number of
Stock Options
 
Weighted Average Option Price
 
Average  Remaining Contractual Life (Years)
 
Aggregate Intrinsic Value
Outstanding at January 1, 2015 (a)
 
298,095

 
$
5.40

 

 

  Exercised
 
(40,158
)
 
10.83

 

 

  Cancelled
 
(5,769
)
 
5.95

 

 

  Expired
 
(2,961
)
 
19.42

 
 
 
 
Outstanding at September 30, 2015
 
249,207

 
$
4.35

 
2.9
 
$
3,131,237
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
Information related to restricted shares at September 30, 2015 is as follows:
 
 
Number of Unvested Restricted Shares
 
Weighted Average Grant Date Fair Value
 
Average Remaining Contractual Life (Years)
 
Aggregate Intrinsic Value
Outstanding at January 1, 2015 (a)
 
867,236

 
$
24.66

 

 

  Granted
 
572,109

 
23.55

 

 

  Vested
 
(323,779
)
 
23.87

 

 

  Cancelled
 
(319,446
)
 
25.73

 

 

Outstanding at September 30, 2015
 
796,120

 
$
23.75

 
1.2
 
$
13,016,562