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
Movement in valuation and qualifying accounts
Balance at Beginning of Year		$ 7,197	$ 5,677	$ 5,514
Additions Charged to Expenses (Income)		1,401	2,494	1,253
Charge-Offs		(600)	(972)	(1,072)
Other	[1]	(79)	(2)	(18)
Balance at End of Year		7,919	7,197	5,677
Reserve for inventory valuation
Movement in valuation and qualifying accounts
Balance at Beginning of Year		8,404	7,202	6,916
Additions Charged to Expenses (Income)		2,656	1,761	2,043
Charge-Offs		(2,286)	(508)	(1,734)
Other	[1]	(503)	(51)	(23)
Balance at End of Year		8,271	8,404	7,202
Valuation allowance for deferred income tax assets
Movement in valuation and qualifying accounts
Balance at Beginning of Year		7,901	8,991	7,798
Additions Charged to Expenses (Income)		(841)	254	889
Charge-Offs		0	0	0
Other	[1]	(743)	(1,344)	304
Balance at End of Year		$ 6,317	$ 7,901	$ 8,991

[1] Primarily the impact of currency changes