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Long-Term Debt (Schedule Of Aggregate Maturities For Debt Outstanding) (Details) - USD ($)
$ in Thousands
Jan. 31, 2019
Jul. 31, 2018
Jan. 31, 2018
Debt Instrument [Line Items]      
2019 (February 2019 through July 2019) $ 24,091    
2020 48,516    
2021 48,580    
2022 48,648    
2023 48,719    
Thereafter 1,179,091    
Total debt $ 1,397,645 $ 1,276,082 $ 1,224,508