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
Movement in valuation and qualifying accounts
Balance at Beginning of Year	$ 5,514		$ 4,203		$ 3,645
Additions Charged to Expenses	1,253		1,443		1,726
Charge-Offs	(1,072)		133		1,170
Other	(18)	[1]	1	[1]	2	[1]
Balance at End of Year	5,677		5,514		4,203
Reserve for inventory valuation
Movement in valuation and qualifying accounts
Balance at Beginning of Year	6,916		7,743		8,297
Additions Charged to Expenses	2,043		1,309		1,515
Charge-Offs	(1,734)		2,146		2,057
Other	(23)	[1]	10	[1]	(12)	[1]
Balance at End of Year	7,202		6,916		7,743
Valuation allowance for deferred income tax assets
Movement in valuation and qualifying accounts
Balance at Beginning of Year	7,798		7,385		7,506
Additions Charged to Expenses	889		646		219
Charge-Offs	0		0		0
Other	304	[1]	(233)	[1]	(340)	[1]
Balance at End of Year	$ 8,991		$ 7,798		$ 7,385

[1] Primarily the impact of currency changes