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Gain on Sale of Businesses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011
Gain on Sale of Businesses (Textuals) [Abstract]
Number of 145 - 155 Foot class liftboats sold		5
Sold liftboats amount		$ 22,349
Pre-tax gain after sale lifeboats	$ 5,884	$ 8,558
Number of 160 Foot class liftboats		1
Number of 200 Foot class liftboats		1

- Definition

The gain (loss) resulting from the sale of a disposal group that is not a discontinued operation. It is included in income from continuing operations before income taxes in the income statement.

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