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Inventories (Schedule Of Components Of Inventories) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Jan. 01, 2018
Dec. 31, 2017
Inventory, Net [Abstract]      
Raw materials $ 33,068   $ 32,994
Work-in-process 17,696   17,786
Finished goods 128,920   113,538
Inventories (Note 2) $ 179,684 $ 163,184 $ 164,318