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Equity-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
The effects of stock-based compensation plans and related costs
The following table presents the effects of the equity and stock based compensation plans and related costs:
 
2016
 
2015
 
2014
 
(In thousands)
General and administrative expenses
$
26,453

 
$
18,529

 
$
9,816

Equity-based compensation capitalized pursuant to full cost method of accounting for oil and natural gas properties
7,079

 
6,043

 
4,437
Schedule of stock/unit option activity
The following table presents the Company’s stock option activity under the Company’s 2012 Equity Incentive Plan (“2012 Plan”) for the year ended December 31, 2016.
 
 
 
Weighted Average
 
 
 
 
 
Exercise
 
Remaining
 
Intrinsic
 
Options
 
Price
 
Term
 
Value
 
 
 
 
 
(in years)
 
(in thousands)
Outstanding at December 31, 2015
39,500

 
$
21.66

 
 
 
 
Exercised
(23,750
)
 
$
20.96

 
 
 
 
Outstanding at December 31, 2016
15,750

 
$
22.72

 
1.03
 
$
1,234

Vested and Expected to vest at December 31, 2016
15,750

 
$
22.72

 
1.03
 
$
1,234

Exercisable at December 31, 2016
12,500

 
$
22.70

 
1.00
 
$
980
Summary of restricted stock awards and units
The following table presents the Company’s restricted stock units activity under the 2012 Plan during the year ended December 31, 2016.
 
Restricted Stock
Awards & Units
 
Weighted Average Grant-Date
Fair Value
Unvested at December 31, 2015
159,759

 
$
64.66

Granted
228,020

 
$
68.79

Vested
(171,850
)
 
$
63.15

Forfeited
(9,925
)
 
$
68.13

Unvested at December 31, 2016
206,004

 
$
70.33
Summary of grant-date fair values of performance restricted stock units granted and related assumptions
The following table presents a summary of the grant-date fair values of performance restricted stock units granted and the related assumptions.
 
2016
 
 
 
 
 
Two-Year Performance Period
 
Three-Year Performance Period
 
2015
 
2014
Grant-date fair value
$
103.41

 
$
102.35

 
$
137.14

 
$
125.63

Risk-free rate
0.86
%
 
1.10
%
 
0.49
%
 
0.30
%
Company volatility
41.91
%
 
42.16
%
 
43.36
%
 
39.60
%
Schedule of performance restricted stock units activity
The following table presents the Company’s performance restricted stock units activity under the 2012 Plan for the year ended December 31, 2016.
 
Performance Restricted Stock Units
 
Weighted Average Grant-Date Fair Value
Unvested at December 31, 2015
90,249

 
$
137.14

Granted
261,488

 
$
103.06

Vested
(83,374
)
 
$
137.14

Forfeited
(15,892
)
 
$
117.80

Unvested at December 31, 2016(1)
252,471

 
$
103.06


(1)
A maximum of 504,942 units could be awarded based upon the Company’s final TSR ranking.
Viper LTIP [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of stock/unit option activity
The following table presents the unit option activity under the Viper LTIP for the year ended December 31, 2016.
 
 
 
Weighted Average
 
 
 
Unit Options
 
Exercise Price
 
Remaining Term
 
Intrinsic Value
 
 
 
 
 
(in years)
 
(in thousands)
Outstanding at December 31, 2015
2,500,000

 
$
26.00

 
 
 
 
Granted
7,600

 
$
18.49

 
 
 
 
Forfeited
(83,334
)
 
$
26.00

 
 
 
 
Outstanding at December 31, 2016
2,424,266

 
$
—

 
0.47
 
$
—

 
 
 
 
 
 
 
 
Vested and Expected to vest at December 31, 2016
2,424,266

 
$
—

 
0.47
 
$
—

Exercisable at December 31, 2016
—

 
$
—

 
0.00
 
$
—
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
 
2014
Grant-date fair value
$
4.24

Expected volatility
36.0
%
Expected dividend yield
5.9
%
Expected term (in years)
3.0

Risk-free rate
0.99
%
Schedule of phantom units activity
The following table presents the phantom unit activity under the Viper LTIP for the year ended December 31, 2016.
 
Phantom Units
 
Weighted Average Grant-Date
Fair Value
Unvested at December 31, 2015
25,348

 
$
16.89

Granted
21,696

 
$
16.57

Vested
(24,350
)
 
$
17.27

Forfeited
(1,646
)
 
$
15.48

Unvested at December 31, 2016
21,048

 
$
16.23