SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts
Valuation and qualifying accounts
Balance at Beginning of Year	$ 1,287	$ 991	$ 1,344
Charged to Costs and Expenses	(48)	355	67
Deductions	294	59	420
Balance at End of Year	945	1,287	991
Allowance for sales discounts
Valuation and qualifying accounts
Balance at Beginning of Year	1,632	1,231	1,181
Charged to Costs and Expenses	(181)	401	50
Balance at End of Year	1,451	1,632	1,231
Allowance for deferred tax assets
Valuation and qualifying accounts
Balance at Beginning of Year	9,720	6,279	7,167
Charged to Costs and Expenses	1,458	3,600	1,082
Deductions	5,632	159	1,970
Balance at End of Year	$ 5,546	$ 9,720	$ 6,279