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Other Balance Sheet And Statement Of Earnings Captions (Other Operating Revenue) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other operating revenue $ 218,227 $ 168,938 $ 164,455
Pari-Mutuel Revenue [Member]      
Other operating revenue 10,783 4,572 3,665
Bowling Revenue [Member]      
Other operating revenue 885 735 642
Other Revenue [Member]      
Other operating revenue 7,150 5,602 5,821
Other Operating Revenue [Member]      
Other operating revenue $ 18,818 $ 10,909 $ 10,128