Retirement Plans (Schedule Of Net Periodic Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 33	$ 31	$ 30
Interest cost	707	748	799
Expected return on plan assets	(856)	(810)	(764)
Amortization of prior service cost	1	1	1
Recognized net actuarial loss	212	194	111
Net periodic benefit cost	97	164	177
Net periodic benefit costs: Discount rate	4.90%	4.00%	5.48%
Net periodic benefit costs: Expected return on plan assets	6.50%	6.50%	6.70%
Projected benefit obligation	16,112	18,034	16,986
Fair value of plan assets	15,039	13,262	12,088
United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	348	338	331
Expected return on plan assets	(321)	(307)	(337)
Amortization of transition amount	(46)	(49)	(47)
Amortization of prior service cost	22	23	22
Recognized net actuarial loss	229	221	107
Net periodic benefit cost	232	226	76
Net periodic benefit costs: Discount rate	4.60%	4.30%	4.70%
Net periodic benefit costs: Expected return on plan assets	5.80%	5.20%	5.70%
Projected benefit obligation	8,450	8,034	6,964
Fair value of plan assets	6,769	6,051	5,160
United States Defined Benefit Plans with Benefit Obligations in Excess of Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	12,513	18,034
Accumulated benefit obligation	12,513	18,034
Fair value of plan assets	11,321	13,262
United Kingdom Defined Benefit Plans with Benefit Obligations in Excess of Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	8,450	8,034
Accumulated benefit obligation	8,450	8,034
Fair value of plan assets	$ 6,769	$ 6,051