Fair Value Measurements (Schedule Of Fair Value Of Assets And Liabilities Measured On Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	$ 18,229	$ 13,233
Fair Value, Measurements, Recurring | Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency forward exchange contracts	10
Total Assets	18,229	13,247
Total liabilities	10
Fair Value, Measurements, Recurring | Quoted Prices In Active Markets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency forward exchange contracts	0
Total Assets	18,229	13,233
Total liabilities	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency forward exchange contracts	10
Total Assets	0	14
Total liabilities	10
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency forward exchange contracts	0
Total Assets	0	0
Total liabilities	0
Certificates Of Deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	18,229	13,233
Certificates Of Deposit | Fair Value, Measurements, Recurring | Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	18,229	13,233
Certificates Of Deposit | Fair Value, Measurements, Recurring | Quoted Prices In Active Markets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	18,229	13,233
Certificates Of Deposit | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	0	0
Certificates Of Deposit | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	0	0
Foreign Exchange Contract | Fair Value, Measurements, Recurring | Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency forward exchange contracts		14
Foreign Exchange Contract | Fair Value, Measurements, Recurring | Quoted Prices In Active Markets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency forward exchange contracts		0
Foreign Exchange Contract | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency forward exchange contracts		14
Foreign Exchange Contract | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency forward exchange contracts		$ 0