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Valuation and Qualifying Accounts (Tables)

9 Months Ended

Sep. 30, 2011

Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

		Balance at												Balance at
		Beginning of				Charged to								End of
		Period				Expense				Deductions(1)				Period
Allowance for doubtful accounts receivable:
Nine months ended September 30, 2011		$	30,112				27,903				(43,597	)		$	14,418
Nine months ended September 30, 2010 (Restated)		$	7,553				29,283				(12,488	)		$	24,348

(1) Deductions represent accounts written off, net of recoveries.

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