Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Valuation Allowance [Table Text Block]

The following table summarizes activity in the Company’s allowance for the years ended December 31(in thousands):

	Balance at Beginning of Year		Additions Charged to Expense		Additions Charged Against Revenues		Deductions from Reserve			Balance at End of Year
2012:
Allowance for doubtful accounts and returns and allowances	$	7,260	$	1,930	$	1,860	$	(4,650	)	$	6,400
2011:
Allowance for doubtful accounts and returns and allowances	$	7,200	$	930	$	4,390	$	(5,260	)	$	7,260
2010:
Allowance for doubtful accounts and returns and allowances	$	8,100	$	800	$	2,000	$	(3,700	)	$	7,200