Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - Scenario, Forecast - ASU 2016-02 $ in Thousands	Jul. 27, 2019 USD ($)
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liabilities	$ 80,000
Right-of-use assets	80,000
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liabilities	100,000
Right-of-use assets	$ 100,000