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Accrued Liabilities - Components of Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Payables and Accruals [Abstract] |  |
Accrued capital costs | $ 199,085 | $ 167,246
Accrued lease operating expenses | 18,660 | 9,786
Accrued general and administrative expenses | 14,203 | 7,703
Other accrued liabilities | 9,882 | 5,128
Total accrued liabilities | $ 241,830 | $ 189,863

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