Restructuring Charges (Schedule Of Accrued Restructuring Balances) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]
Balance as of December 31, 2011			$ 2,309
Restructuring Charges	523	145	773	625
Cash Payment			(2,514)
Foreign Exchange Adjustments			(7)
Balance as of September 30, 2012	561		561
2012 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			628
Cash Payment			(499)
Foreign Exchange Adjustments			(1)
Balance as of September 30, 2012	128		128
2011 [Member]
Restructuring Cost and Reserve [Line Items]
Balance as of December 31, 2011			1,853
Restructuring Charges			(6)
Cash Payment			(1,424)
Foreign Exchange Adjustments			(6)
Balance as of September 30, 2012	417		417
2010 [Member]
Restructuring Cost and Reserve [Line Items]
Balance as of December 31, 2011			54
Restructuring Charges			64
Cash Payment			(102)
Foreign Exchange Adjustments
Balance as of September 30, 2012	16		16
2009 [Member]
Restructuring Cost and Reserve [Line Items]
Balance as of December 31, 2011			402
Restructuring Charges			87
Cash Payment			(489)
Foreign Exchange Adjustments
Severance [Member] | 2012 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			573
Cash Payment			(445)
Foreign Exchange Adjustments
Balance as of September 30, 2012	128		128
Severance [Member] | 2011 [Member]
Restructuring Cost and Reserve [Line Items]
Balance as of December 31, 2011			189
Restructuring Charges			316
Cash Payment			(616)
Foreign Exchange Adjustments			14
Balance as of September 30, 2012	(97)		(97)
Severance [Member] | 2010 [Member]
Restructuring Cost and Reserve [Line Items]
Balance as of December 31, 2011			34
Restructuring Charges			(4)
Cash Payment			(30)
Foreign Exchange Adjustments
Lease Facility Costs [Member] | 2012 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			55
Cash Payment			(54)
Foreign Exchange Adjustments			(1)
Lease Facility Costs [Member] | 2011 [Member]
Restructuring Cost and Reserve [Line Items]
Balance as of December 31, 2011			1,664
Restructuring Charges			(339)
Cash Payment			(791)
Foreign Exchange Adjustments			(20)
Balance as of September 30, 2012	514		514
Lease Facility Costs [Member] | 2009 [Member]
Restructuring Cost and Reserve [Line Items]
Balance as of December 31, 2011			402
Restructuring Charges			87
Cash Payment			(489)
Foreign Exchange Adjustments
Other Exit Costs [Member] | 2011 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			17
Cash Payment			(17)
Foreign Exchange Adjustments
Other Exit Costs [Member] | 2010 [Member]
Restructuring Cost and Reserve [Line Items]
Balance as of December 31, 2011			20
Restructuring Charges			68
Cash Payment			(72)
Foreign Exchange Adjustments
Balance as of September 30, 2012	$ 16		$ 16