Receivables (Tables)

3 Months Ended

Mar. 31, 2012

Receivables [Abstract]

Summary of the Company's receivable balances

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

	March 31,			December 31,
	2012			2011
Accounts receivable	$	233,585		$	214,608
Notes receivable		-			16
Other receivables		2,981			2,108
Gross receivables		236,566			216,732
Allowance for doubtful accounts receivable		(803	)		(125	)
Net receivables	$	235,763		$	216,607