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Loans Payable and Long-Term Debt (Narrative) (Details) - USD ($) |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 29, 2017 | Jan. 25, 2016 | Apr. 30, 2020 | Apr. 30, 2019 | Feb. 12, 2018
Debt Instrument [Line Items] |  |  |  |  |
Debt, outstanding balance |  |  | $ 606,346,000 | $ 703,305,000 |
New Markets Tax Credit Investment |  | $ 2,300,000 |  |  |
New Markets Tax Credit, Recapture Period |  | 7 years |  |  |
Debt issuance costs |  |  | 9,209,000 | 11,814,000 |
Outstanding amounts under finance lease obligations |  |  | 5,687,000 | 6,600,000 |
Notes Payable to Banks [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
LIBOR rate |  | 1.20% |  |  |
Loan agreement amount |  | $ 6,600,000 |  |  |
Loan term |  | 30 years |  |  |
Debt issuance costs |  | $ 300,000 |  |  |
Deferred Finance Costs, Amortization Period |  | 30 years |  |  |
Other Noncurrent Assets [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Financing Receivable, after Allowance for Credit Loss, Noncurrent |  | $ 4,300,000 |  |  |
Long-term Debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount drawn on loan |  |  | 6,700,000 |  |
Initial Term Loan [Member] | Loans Payable [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount outstanding |  |  | 122,000,000 | 170,000,000 |
Loan agreement amount | $ 250,000,000 |  |  |  |
Initial Term Loan And Delayed Draw Loan [Member] | Loans Payable [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount outstanding |  |  | 244,000,000 | 340,000,000 |
Delayed Draw Term Loan [Member] | Loans Payable [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount outstanding |  |  | 170,000,000 | 230,000,000 |
Loan agreement amount | 250,000,000 |  |  |  |
4.875% Senior Notes Due 2026 [Member] | Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Loan agreement amount |  |  |  |  | $ 350,000,000
Debt instrument, interest rate, stated percentage |  |  |  |  | 4.875%
RSI Notes [Member] | Secured Debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Fair Value |  |  | 330,000,000 |  |
Long-term Debt |  |  | $ 350,000,000 |  |
Minimum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rates on finance leases (percent) |  |  | 3.50% |  |
Maximum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rates on finance leases (percent) |  |  | 6.50% |  |
Revolving Credit Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount outstanding |  |  | $ 0 | $ 0 |
Total Secured Debt To EBITDA Ratio |  |  | 2.50 |  |
Proceeds from term loan | 50,000,000 |  |  |  |
Line of Credit Facility, Commitment Fee Percentage |  |  | 0.175% |  |
Total Funded Debt to EBITDA Ratio, thereafter |  |  | 3.25 |  |
Total Funded Debt to EBITDA Ratio upon Qualified Acquisition |  |  | 3.75 |  |
Fixed Charge Coverage Ratio |  |  | 1.25 |  |
Total Funded Debt to EBITDA Ratio to Permit Unlimited Restricted Payments |  |  | 2.50 |  |
Debt Covenant, Permitted Restricted Payments |  |  | $ 50,000,000 |  |
Total Funded Debt to EBITDA Ratio, applicable to the exception permitting unlimited restricted payments, amended |  |  | 2.75 |  |
Revolving Credit Facility [Member] | Wells Fargo [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line Of Credit Facility, Agreement Terminated | 35,000,000 |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member] | Minimum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Spread on interest rate |  |  | 0.50% |  |
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member] | Maximum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Spread on interest rate |  |  | 1.50% |  |
RSI Home Products, Inc. [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Indebtedness assumed (including accrued interest) | $ 589,000,000 |  |  |  |
RSI Home Products, Inc. [Member] | Initial Term Loan [Member] | Loans Payable [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Loan term | 5 years |  |  |  |
RSI Home Products, Inc. [Member] | RSI Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Indebtedness assumed (including accrued interest) | $ 589,000,000 |  |  |  |
RSI Home Products, Inc. [Member] | Revolving Credit Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Proceeds from term loan | $ 50,000,000 |  |  |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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- Definition Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)(a)(2)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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