The net realized foreign currency transaction gain (loss) (pretax) included in determining net income from transactions that were settled as of the balance sheet date.

+ References+ Details

The aggregate unrealized foreign currency transaction gain (loss) (pretax) included in determining net income for the reporting period. Represents the aggregate of gains (losses) on transactions that are unsettled as of the balance sheet date, which is therefore an adjustment to reconcile income (loss) from continuing operations to net cash provided by or used in continuing operations. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting entity's financial statements. For certain entities, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

+ References+ Details

Derivative Instruments - Additional Information (Detail)	12 Months Ended					12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2012 Norwegian Kroner denominated bonds due May 2017 [Member] NOK	May 31, 2012 Norwegian Kroner denominated bonds due May 2017 [Member] NOK	Dec. 31, 2012 Cross currency swap agreement [Member] USD ($)
Derivative [Line Items]
Senior unsecured bond issued				700,000,000	700,000,000
Derivative fair value liabilities, net		600,000
Derivative fair value assets, net	1,100,000
Unrealized losses on derivatives	(8,923,000)	10,221,000	26,700,000			(2,700,000)
Realized gains on derivatives						$ 300,000