Quarterly report pursuant to Section 13 or 15(d)

Equity Investments Equity Investment (Diamondback Balance Sheet Disclosure) (Details)

v2.4.0.8
Equity Investments Equity Investment (Diamondback Balance Sheet Disclosure) (Details) (Diamondback Energy LLC [Member], USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Diamondback Energy LLC [Member]
   
Schedule of Equity Method Investments [Line Items]    
Current assets $ 116,536 $ 50,275
Noncurrent assets 682,103 556,426
Current liabilities 97,487 79,232
Noncurrent liabilities $ 73,543 $ 65,401