SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for doubtful accounts
Valuation and qualifying accounts
Balance at Beginning of Year	$ 929	$ 945	$ 1,287
Charged to Costs and Expenses	440	151	(48)
Valuation Allowances and Reserves, Charged to Other Accounts	0	0	0
Deductions	227	167	294
Balance at End of Year	1,142	929	945
Allowance for sales discounts
Valuation and qualifying accounts
Balance at Beginning of Year	2,089	1,451	1,632
Charged to Costs and Expenses	617	638	(181)
Valuation Allowances and Reserves, Charged to Other Accounts	0	0	0
Balance at End of Year	2,706	2,089	1,451
Allowance for deferred tax assets
Valuation and qualifying accounts
Balance at Beginning of Year	6,754	5,546	9,720
Charged to Costs and Expenses	$ 1,577	1,397	1,458
Valuation Allowances and Reserves, Charged to Other Accounts		0	0
Deductions	$ 756	189	5,632
Balance at End of Year	$ 7,575	$ 6,754	$ 5,546