Accounts Receivable (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounts Receivable [Abstract]
Retail and wholesale	$ 581,152	$ 639,842
Other	45,819	52,363
Less: Allowance for doubtful accounts	(93,267)	(107,048)
Accounts receivable, net	533,704	585,157
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at end of Period	93,267	107,048
Allowance for Doubtful Accounts [Member]
Accounts Receivable [Abstract]
Less: Allowance for doubtful accounts	(93,267)	(107,048)	(73,571)
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of Period	107,048	73,571	30,171
Additions - Charged to Other Revenue	74,332	93,721	55,161
Additions - Charged to Switched and Nonswitched Revenue	14,396	16,403	14,873
Deductions	(102,509)	(76,647)	(26,634)
Balance at end of Period	$ 93,267	$ 107,048	$ 73,571