XML 66 R48.htm IDEA: XBRL DOCUMENT v3.3.1.900
Equity-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of unvested share activity
The activity related to these awards during the period from December 31, 2012 to December 31, 2015 is summarized below:
 
Unvested
Shares
 
Average
Grant Date
Fair Value
 
Aggregate Fair Value of Shares (in thousands)
Outstanding at December 31, 2012
450,552

 
$
26.87

 
 
Awards granted - 2013
201,451

 
$
52.78

 


Awards vested - 2013
(107,988
)
 
$
25.71

 
$
2,776

Awards forfeited - 2013
(13,412
)
 
$
32.36

 
 
Outstanding at December 31, 2013
530,603

 
$
36.80

 
 
Awards granted - 2014
207,786

 
$
77.14

 


Awards vested - 2014
(169,340
)
 
$
33.07

 
$
5,600

Awards forfeited - 2014
(119,130
)
 
$
42.16

 
 
Outstanding at December 31, 2014
449,919

 
$
70.69

 
 
Awards granted - 2015
151,789

 
$
77.93

 
 
Awards vested - 2015
(181,906
)
 
$
35.18

 
$
6,399

Awards forfeited - 2015
(8,494
)
 
$
42.05

 
 
Outstanding at December 31, 2015
411,308

 
$
75.25

 
 
Schedule of Share-based Payment Award Valuation Assumptions [Table Text Block]
The following table sets forth the assumptions used in the valuations of these awards granted in 2015, 2014 and 2013:
 
2015
 
2014
 
2013
Volatility
26.8%
 
29.3%
 
28.9%
Risk-free interest rate
1.06%
 
0.66%
 
0.35%
Rose Rock equity incentive plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of unvested share activity
The activity related to these awards is summarized below:
 
Unvested Units
 
Average Grant Date Fair Value
 
Aggregate Fair Value of Units (in thousands)
Outstanding at December 31, 2012
43,960

 
$
21.91

 
 
Awards granted - 2013
49,104

 
$
34.41

 
 
Awards vested - 2013
(9,333
)
 
$
27.25

 
$
254

Awards forfeited - 2013
(783
)
 
$
34.40

 
 
Outstanding at December 31, 2013
82,948

 
$
28.59

 
 
Awards granted - 2014
46,536

 
$
41.35

 
 
Awards vested - 2014
(5,712
)
 
$
35.87

 
$
205

Awards forfeited - 2014
(21,432
)
 
$
29.82

 
 
Outstanding at December 31, 2014
102,340

 
$
33.79

 
 
Awards granted - 2015
36,527

 
$
39.03

 
 
Awards vested - 2015
(38,366
)
 
$
27.54

 
$
1,057

Awards forfeited - 2015
(310
)
 
$
42.80

 
 
Outstanding at December 31, 2015
100,191

 
$
38.70