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Retirement Benefit Plans (Schedule Of Components Of Net Periodic Benefit Cost) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Retirement Benefit Plans [Abstract]      
Service cost $ 71 $ 64 $ 209
Interest cost 125 149 120
Recognition of net actuarial (gain) loss 38 28 (105)
Total recognized in the consolidated income statements 234 241 224
Recognition of net actuarial loss (gain) 79 174 42
Total recognized in other comprehensive income (pre-tax) 79 174 42
Total recognized in the consolidated income statements and other comprehensive income (pre-tax) $ 313 $ 415 $ 266