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Accounting Developments (Details) - USD ($)
$ in Thousands
Feb. 29, 2020
Dec. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Operating lease liabilities $ 579,570  
ASU 2016-02    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Operating ROU assets   $ 519,900
Operating lease liabilities   $ 586,300