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International Retirement Plan (Reconciliation Of Changes In Projected Benefit Obligation) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]    
Obligations as of January 1 $ 7,062  
Obligations as of December 31 6,211 $ 7,062
International Retirement Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Obligations as of January 1 7,194 5,987
Service cost 178 150
Interest cost 156 200
Actuarial (gain) loss (338) 1,719
Benefit payments (119) (144)
Effect of foreign currency exchange rate changes (743) (718)
Obligations as of December 31 6,328 7,194
Funded status as of December 31 (net of tax benefit) $ (6,328) $ (7,194)