Accounts Receivable (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Accounts Receivable [Abstract]
Retail and Wholesale	$ 537,644,000		$ 581,152,000
Other	39,266,000		45,819,000
Less: Allowance for doubtful accounts	(96,164,000)		(93,267,000)
Accounts receivable, net	480,746,000		533,704,000
Bad debt expense	$ 16,200,000	$ 16,600,000