Goodwill And Intangible Assets, Net (Schedule Of Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Cost	$ 114,227	$ 107,973
Accumulated Amortization	70,381	61,818
Net	43,846	46,155
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Cost		2,192
Accumulated Amortization		2,075
Net		117
Product Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	32,558	29,748
Accumulated Amortization	25,251	20,877
Net	7,307	8,871
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	80,398	74,922
Accumulated Amortization	44,382	38,190
Net	36,016	36,732
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,271	1,111
Accumulated Amortization	748	676
Net	$ 523	$ 435