Quarterly report pursuant to Section 13 or 15(d)

Equity Investment (Diamondback Balance Sheet Disclosure) (Details)

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Equity Investment (Diamondback Balance Sheet Disclosure) (Details) (Diamondback Energy LLC [Member], 美元$)
In Thousands, unless otherwise specified
9月. 30, 2013
12月. 31, 2012
Diamondback Energy LLC [Member]
   
Schedule of Equity Method Investments [Line Items]    
流动资产 $ 91,915 $ 50,275
非流动资产 1,373,981 556,426
流动负债 109,451 79,232
非流动负债 $ 533,507 $ 65,401