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Fixed Assets (Tables)
3 Months Ended
Mar. 31, 2021
Property, Plant and Equipment [Abstract]  
Schedule Of Fixed Assets
Fixed assets consisted of the following at:
 March 31,December 31,
(In thousands)20212020
Fixed assets, at cost$770,045 $750,138 
Less accumulated depreciation and amortization377,332 362,920 
Fixed assets, net$392,713 $387,218