Quarterly report pursuant to Section 13 or 15(d)

公允价值计量(详情)

v2.4.0.6
公允价值计量(详情) (USD $)
In Thousands, unless otherwise specified
3个月结束
3月. 31, 2013
3月. 31, 2012
12月. 31, 2012
Fair Value, 资产 and 负债 Measured on Recurring and Nonrecurring Basis [Line Items]      
资产 $ 343   $ 664
Asset retirement obligation capitalized 670 598  
Level 1 [Member] | Diamondback Energy LLC [Member]
     
Fair Value, 资产 and 负债 Measured on Recurring and Nonrecurring Basis [Line Items]      
Diamondback的股权投资 212,413    
Level 1 [Member] | Fixed Price Swaps [Member]
     
Fair Value, 资产 and 负债 Measured on Recurring and Nonrecurring Basis [Line Items]      
资产 0    
负债 0    
Level 2 [Member] | Diamondback Energy LLC [Member]
     
Fair Value, 资产 and 负债 Measured on Recurring and Nonrecurring Basis [Line Items]      
Diamondback的股权投资 0    
Level 2 [Member] | Fixed Price Swaps [Member]
     
Fair Value, 资产 and 负债 Measured on Recurring and Nonrecurring Basis [Line Items]      
资产 343    
负债 9,689    
三级[会员]
     
Fair Value, 资产 and 负债 Measured on Recurring and Nonrecurring Basis [Line Items]      
Asset retirement obligation capitalized 700    
三级[会员] | Diamondback Energy LLC [Member]
     
Fair Value, 资产 and 负债 Measured on Recurring and Nonrecurring Basis [Line Items]      
Diamondback的股权投资 0    
三级[会员] | Fixed Price Swaps [Member]
     
Fair Value, 资产 and 负债 Measured on Recurring and Nonrecurring Basis [Line Items]      
资产 0    
负债 $ 0