Income Taxes (Schedule Of Deferred Tax Liabilities And Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred income tax liabilities:
Amortization of goodwill and identifiable intangibles	$ 13,416	$ 22,739
Foreign currency translation gain adjustment	300	433
Deferred Tax Liabilities, Investments	15,131	8,602
Derivative financial instruments	0	167
Deferred Tax Liabilities, Other	184	0
Total deferred income tax liabilities	29,031	31,941
Deferred Tax Assets, Property, Plant and Equipment	2,399	4,917
Deferred income tax assets:
Pensions	17,153	19,626
Employee benefits	6,676	6,842
Inventory	3,644	2,884
Excess capital losses	1,519	4,695
Tax benefit on U.S. federal, state and foreign NOL and credit carryforwards	23,507	33,384
Asset write-offs, divestitures and environmental accruals	1,200	1,754
Timing adjustment for unrecognized tax benefits on uncertain tax positions, including portion relating to interest and penalties	267	184
Allowance for doubtful accounts	382	406
Derivative financial instruments	432	0
Other	0	261
Deferred income tax assets before valuation allowance	57,179	74,953
Less: Valuation allowance	24,736	28,499
Net deferred income tax (assets) liabilities	3,412	14,513
Deferred Tax Assets, Net, Noncurrent	3,412	16,636
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	32,443	46,454
Pension and other postretirement benefit obligations, net	$ 0	$ 2,123