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Related Party Transactions (Changes In The Affiliate Payable/Receivables Balance) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Related Party Transactions [Abstract]
Net affiliate receivable as of December 31, 2011	$ 3,734
Revenues and other increases	187,036
Expenditures	(155,351)
Settlements from the Fund	(26,100)
Net affiliate payable as of September 30, 2012	$ 9,319

Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

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