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Fixed Assets (Tables)
9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Schedule Of Fixed Assets
Fixed assets consisted of the following at:
 September 30,December 31,
(In thousands)20212020
Fixed assets, at cost$825,415 $750,138 
Less accumulated depreciation and amortization404,362 362,920 
Fixed assets, net$421,053 $387,218