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Fixed Assets (Tables)
6 Months Ended
Jun. 30, 2019
Property, Plant and Equipment [Abstract]  
Schedule Of Fixed Assets
Fixed assets consisted of the following at:
 June 30,December 31,
(In thousands)20192018
Fixed assets, at cost$599,781 $559,234 
Less accumulated depreciation and amortization260,168 236,358 
Fixed assets, net$339,613 $322,876