Employee Benefits (Schedule Of Net Benefit Costs And Amounts Recognized In Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Amortization of net loss	$ (1,429)	$ (2,663)	$ (924)
U. S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,261	29	334
Administrative expenses	2,919	0	0
Interest cost	8,832	2,015	2,322
Expected return on plan assets	(15,354)	(2,960)	(3,140)
Net amortization	1,307	1,270	571
Settlement benefits	371	355	0
Net periodic benefit (gain) cost	(664)	709	87
Net (gain) loss emerging	(66,379)	898	9,352
Amortization of net loss	(1,307)	(1,270)	(274)
Amortization of prior service cost	0	0	(297)
Settlement benefits	(371)	(355)	0
Total recognized in OCI	(68,057)	(727)	8,781
Total net periodic benefit cost and OCI	(68,721)	(18)	8,868
Non-U. S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,459	1,661	602
Administrative expenses	0	0	0
Interest cost	2,441	2,110	1,366
Expected return on plan assets	(199)	0	0
Net amortization	0	1,048	0
Settlement benefits	0	0	0
Net periodic benefit (gain) cost	3,701	4,819	1,968
Net (gain) loss emerging	12,893	(17,310)	15,425
Amortization of net loss	0	(1,048)	0
Amortization of prior service cost	0	0	0
Settlement benefits	0	0	0
Total recognized in OCI	12,893	(18,358)	15,425
Total net periodic benefit cost and OCI	16,594	(13,539)	17,393
U. S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	289	22	22
Interest cost	1,000	571	733
Net amortization	122	345	353
Net periodic benefit (gain) cost	1,411	938	1,108
Net (gain) loss emerging	(6,151)	(1,848)	989
Curtailment	(364)	0	0
Amortization of net loss	(122)	(345)	(303)
Amortization of prior service cost	0	0	(50)
Total recognized in OCI	(6,637)	(2,193)	636
Total net periodic benefit cost and OCI	(5,226)	$ (1,255)	$ 1,744
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5
Interest cost	12
Net amortization	0
Net periodic benefit (gain) cost	17
Net (gain) loss emerging	91
Curtailment	0
Amortization of net loss	0
Amortization of prior service cost	0
Total recognized in OCI	91
Total net periodic benefit cost and OCI	$ 108