Accounting Pronouncements (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Aug. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	$ 45,399
Operating lease liability	$ 47,350
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets		$ 35,842
Operating lease liability		$ 36,417