Accumulated Other Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2018

Accumulated Other Comprehensive Income [Abstract]

Summary Of Accumulated Other Comprehensive Income

(Dollars in thousands)	Foreign Currency Items		Unrealized Gain (Losses) on Available-for-Sale Investments		Accrued Pension Service Costs		Total
Balance at January 1, 2018	$	23,575	$	8	$	(2,592)	$	20,991
Net current-period other comprehensive (loss) income		(800)		(2)		52		(750)
Balance at March 31, 2018	$	22,775	$	6	$	(2,540)	$	20,241