Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reserves For Doubtful Accounts Receivable [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 2,632	$ 3,239	$ 2,828
Charges to Costs and Expenses	1,601	1,108	1,484
Write-Offs/Cash Payments	(762)	(1,732)	(1,011)
Foreign Currency Translation	62	17	(62)
Balance at End of Year	3,533	2,632	3,239
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	4,547	4,614	4,604
Charges to Costs and Expenses	735	265	837
Valuation Allowances and Reserves, Charged to Other Accounts	742
Write-Offs/Cash Payments	(701)	(358)	(741)
Foreign Currency Translation	(122)	26	(86)
Balance at End of Year	$ 5,201	$ 4,547	$ 4,614