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Long-Term Debt Obligations (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Long-term debt consists of:
Long-term borrowing	$ 93,735	$ 55,295
Less: Amounts due within one year	8,941	8,547
Long-Term Debt	84,794	46,748
North Ocean Construction Financing \| North Ocean 102
Long-term debt consists of:
Long-term borrowing	43,325	51,872
North Ocean Construction Financing \| North Ocean 105
Long-term debt consists of:
Long-term borrowing	$ 50,410	$ 3,423

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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