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International Retirement Plan (Components Of Net Periodic Benefit Costs And Other Amounts Recognized In Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
International Retirement Plan [Abstract]        
Service cost $ 49 $ 43 $ 96 $ 88
Interest cost 66 60 128 122
Total $ 115 $ 103 $ 224 $ 210