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Long-Term Debt - Components of Long-Term Debt (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2017 | Nov. 08, 2016 | Nov. 26, 2016 | Aug. 26, 2017 | Aug. 27, 2016 | Aug. 29, 2015
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt, gross |  |  |  | $ 284,000 | $ 0 |
Less: debt issuance cost, net |  |  |  | (9,424) | 0 |
Long-term debt |  |  |  | 274,576 | 0 |
Less: current maturities |  |  |  | (2,850) | 0 |
Long-term debt, less current maturities |  |  |  | 271,726 | 0 |
Debt Issuance Costs, Gross |  |  |  | 9,400 |  |
Accumulated Amortization, Debt Issuance Costs |  |  |  | 1,600 |  |
Debt Issuance Costs, Current, Net |  |  |  | 1,400 |  |
Debt Issuance Costs, Noncurrent, Net |  |  |  | 8,000 |  |
Amortization of Debt Issuance Costs |  |  |  | 1,596 | 0 | $ 0
Prior Credit Agreement [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Amortization of Debt Issuance Costs |  |  | $ 100 |  |  |
Line of Credit [Member] | ABL |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt, gross |  |  |  | 0 | 0 |
Line of Credit [Member] | Term Loan |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt, gross |  |  |  | $ 284,000 | $ 0 |
JPMorgan Chase [Member] | Line of Credit [Member] | ABL |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 125,000 |  |  |  |
Debt Instrument, Term |  | 5 years |  |  |  |
JPMorgan Chase [Member] | Line of Credit [Member] | Letter of Credit [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 10,000 |  |  |  |
JPMorgan Chase [Member] | Line of Credit [Member] | Term Loan |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 300,000 |  |  |  |
Debt Instrument, Term |  | 7 years |  |  |  |
Debt Instrument, Periodic Payment, Principal, Percent of Original Amount |  | 1.00% |  |  |  |
Line of Credit Facility, Accordion Feature, Increase Limit |  | $ 125,000 |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  | 5.70% |  |
Scenario, Forecast [Member] | JPMorgan Chase [Member] | Line of Credit [Member] | Term Loan |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal, Percent of Original Amount | 1.25% |  |  |  |  |

X
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- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(8)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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