Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Long-Term Debt - Senior Notes (Details) - USD ($) $ in Thousands	Nov. 27, 2018	Apr. 25, 2020	Jan. 25, 2020	Apr. 27, 2019
Long-term Debt, by Current and Noncurrent [Abstract]
Outstanding principal amount		$ 343,022	$ 343,340	$ 346,309
First Lien Agreement
Long-term Debt, by Current and Noncurrent [Abstract]
Outstanding principal amount	$ 339,500
Term Loan
Long-term Debt, by Current and Noncurrent [Abstract]
Additional borrowings	50,000
Outstanding principal amount		$ 335,102	$ 335,982	$ 338,620
Repayment of borrowings	$ 49,600