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Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]    
Net operating loss carryforward $ 17,215 $ 13,926
Bonus and stock-based compensation 8,060 3,571
Derivative instruments 1,664  
Total deferred tax assets 26,939 17,497
Oil and natural gas properties 343,751 191,271
Derivative instruments   8,455
Total deferred tax liabilities 343,751 199,726
Total net deferred tax liability $ 316,812 $ 182,229