Accounts Receivable (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accounts Receivable [Abstract]
Retail and wholesale	$ 670,842	$ 588,147
Other	52,363	53,732
Less: Allowance for doubtful accounts	(107,048)	(73,571)
Accounts receivable, net	616,157	568,308
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at end of Period	107,048	73,571
Accounts receivable and allowance for doubtful accounts, fair value adjustment	9,794	44,859
Allowance for Doubtful Accounts [Member]
Accounts Receivable [Abstract]
Less: Allowance for doubtful accounts	(107,048)	(73,571)	(30,171)
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of Period	73,571	30,171	40,125
Additions - Charged to bad debt expense	93,721	55,161	33,682
Additions - Charged to other accounts - Revenue	16,403	14,873	(6,181)
Deductions	(76,647)	(26,634)	(37,455)
Balance at end of Period	$ 107,048	$ 73,571	$ 30,171