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BUSINESS SEGMENT, MAJOR CUSTOMERS AND RELATED PARTY INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Related Party Transaction [Line Items]
Ownership interest (in hundredths)	40.00%		40.00%
Contract work	$ 0.4	$ 0.5	$ 0.9	$ 1.1
Payable to related party	$ 0.4		$ 0.4		$ 0.5

Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

Amount of transactions with related party during the financial reporting period.

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