Retirement Plans (Schedule Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 9	$ 6	$ 19	$ 12
Interest cost	185	192	370	385
Expected return on plan assets	(204)	(242)	(408)	(484)
Recognized net actuarial loss	(69)	(17)	(138)	(33)
Net periodic benefit (income) cost	59	(27)	119	(54)
United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	77	101	153	200
Expected return on plan assets	(83)	(95)	(166)	(189)
Amortization of transition amount	5	(7)	10	(14)
Recognized net actuarial loss	(59)	(50)	(117)	(100)
Net periodic benefit (income) cost	$ 58	$ 49	$ 114	$ 97