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Income Taxes - Components of Company's Deferred Tax Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Deferred tax assets:    
Vessels and equipment $ 73,750 $ 58,825
Tax losses carried forward 427,656 427,443
Other 32,012 64,194
Total deferred tax assets 533,418 550,462
Deferred tax liabilities:    
Vessels and equipment 19,555 26,503
Long-term debt 22,008 33,764
Other 30,519 40,117
Total deferred tax liabilities 72,082 100,384
Net deferred tax assets 461,336 450,078
Valuation allowance (442,504) (421,343)
Net deferred tax assets $ 18,832 $ 28,735