Accrued Liabilities

12 Months Ended

Dec. 31, 2011

Accrued Liabilities [Abstract]

ACCRUED LIABILITIES

(3) ACCRUED LIABILITIES

Accrued liabilities consisted of the following:

	December 31,		December 31,
	2011		2010
	(Thousands of dollars)
Salaries & wages	$	8,699	$	7,560
Interest		5,877		7,210
Vacation payable		4,305		3,800
Group medical		1,695		1,895
Transportations tax		1,448		1,168
Operating lease		880		1,130
Workers compensation		678		631
Other		5,469		4,925
Total accrued liabilities	$	29,051	$	28,319