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Income Taxes - Net Deferred Income Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Current deferred income taxes: |  |
Assets | $ 84,244 | $ 51,570
Liabilities | (39,405) | (41,428)
Net current deferred income taxes | 44,839 | 10,142
Non-current deferred income taxes: |  |
Assets | 87,089 | 89,129
Liabilities | (331,345) | (314,179)
Net non-current deferred income taxes | (244,256) | (225,050)
Total net deferred income tax liabilities | $ (199,417) | $ (214,908)

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