XML 26 R22.htm IDEA: XBRL DOCUMENT v3.2.0.727
Equity awards (Tables)
 6 Months Ended
Jun. 30, 2015
Equity awards [Abstract]  
Option Award Activity
The following is a summary of stock option award activity under the Emergent Plans:

  
2006 Plan
  
2004 Plan
   
  
Number of Shares
  
Weighted-Average Exercise Price
  
Number of Shares
  
Weighted-Average Exercise Price
  
Aggregate Intrinsic Value
 
Outstanding at December 31, 2014
  
3,837,993
  
$
20.04
   
43,156
  
$
10.28
  
$
29,181,534
 
Granted
  
685,841
   
29.00
   
-
   
-
     
Exercised
  
(734,596
)
  
16.87
   
(13,457
)
  
31.33
     
Forfeited
  
(80,257
)
  
23.17
   
-
   
-
     
Outstanding at June 30, 2015
  
3,708,981
  
$
22.25
   
29,699
  
$
10.28
  
$
40,371,293
 
Exercisable at June 30, 2015
  
2,014,030
  
$
19.26
   
29,699
  
$
10.28
  
$
28,238,161
 
Restricted Stock Units Activity
The following is a summary of restricted stock unit award activity under the 2006 Plan:

  
Number of Shares
  
Weighted-Average Grant Price
  
Aggregate Intrinsic Value
 
Outstanding at December 31, 2014
  
927,356
  
$
22.44
  
$
25,251,904
 
Granted
  
457,161
   
29.44
     
Vested
  
(393,811
)
  
20.73
     
Forfeited
  
(29,017
)
  
25.19
     
Outstanding at June 30, 2015
  
961,689
  
$
26.38
  
$
31,687,654