Business, Basis of Presentation and Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands		3 Months Ended
	May 01, 2019	Jul. 31, 2019
Adoption of new accounting pronouncement
Operating lease right-of-use assets		$ 111,213
Operating lease liability		116,006
Operating lease right-of-use assets obtained in exchange for lease obligations		$ 6,241
Adjustment | ASU 2016-02
Adoption of new accounting pronouncement
Operating lease right-of-use assets	$ 118,800
Operating lease liability	118,800
Operating lease right-of-use assets obtained in exchange for lease obligations	$ 4,800