Receivables

6 Months Ended

Jun. 30, 2011

Receivables [Abstract]

Receivables

5. Receivables

The following is a summary of the Company’s receivable balances (in thousands of dollars):

	June 30,			December 31,
	2011			2010
Accounts receivable	$	151,671		$	126,671
Notes receivable		44			139
Other receivables		660			748
Gross receivables		152,375			127,558
Allowance for doubtful accounts receivable		(309	)		(260	)
Net receivables	$	152,066		$	127,298

Bad debt expense related to receivables for the three and six months ended June 30, 2011 was negligible.  Bad debt expense related to receivables for the three and six months ended June 30, 2010, resulted in a $0.1 million and $0.2 million recovery, respectively, of receivables charged to bad debt expense in prior periods.