Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2011

Valuation and Qualifying Accounts [Abstract]

Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

VALUATION AND QUALIFYING ACCOUNTS

FOR THE YEARS ENDED DECEMBER 31, 2011, 2010 AND 2009

(Thousands of dollars)

			Additions
	Balance at Beginning of Year		Charge to Costs and Expenses		Other Comprehensive Income (Loss)			Deductions From Reserves			Balance at End of Year
2011
Allowance for doubtful accounts	$	983	$	22	-			$	(666	)	$	339
Inventory reserves	$	3,912	$	71	-			$	(385	)	$	3,598
Valuation allowances for deferred tax assets	$	43,250			$	(955	)	$	(42,295	)	$	—
2010
Allowance for doubtful accounts	$	486	$	504	-			$	(7	)	$	983
Inventory reserves	$	3,766	$	506	-			$	(360	)	$	3,912
Valuation allowances for deferred tax assets	$	66,143	-		$	132		$	(23,025	)	$	43,250
2009
Allowance for doubtful accounts	$	3,128	$	485	-			$	(3,127	)	$	486
Inventory reserves	$	2,232	$	1,719	-			$	(185	)	$	3,766
Valuation allowances for deferred tax assets	$	19,357	$	46,028	$	758		-			$	66,143