Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2012

Accounts Receivable [Abstract]

Schedule Of Accounts Receivable

	March 31, 2012			December 31, 2011
Trade customers	$	432,927		$	391,401
Affiliates		134			122
Allowance for doubtful accounts		(10,818	)		(10,969	)
		422,243			380,554
Federal and state taxes		7,169			16,113
Other		15,197			10,705
Accounts receivable, net	$	444,609		$	407,372