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Basis Of Presentation And Significant Accounting Policies (Schedule Of Bad Debt Expense) (Details) (USD $) In Thousands, unless otherwise specified	7 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2011	May 31, 2010	May 31, 2009
Basis Of Presentation And Significant Accounting Policies [Abstract]
Bad debt expense	$ 6,140	$ 10,059	$ 7,785	$ 5,893

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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