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Fair Value Measurements - Narrative (Details) - USD ($) | Dec. 30, 2017 | Dec. 14, 2017 | Sep. 30, 2017 | Dec. 24, 2016 | Nov. 30, 2015
--- | --- | --- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Carrying value of senior subordinated notes | $ 691,336,000 |  | $ 395,653,000 | $ 395,408,000 |
Senior notes |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Carrying value of senior subordinated notes | 690,839,000 |  | 395,160,000 | 394,564,000 |
Senior notes | Senior notes, interest at 5.125%, payable semi-annually, principal due February 2028 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Debt, aggregate principal amount | $ 300,000,000 |  |  |  |
Debt instrument interest rate stated, percentage | 5.125% | 5.125% |  |  |
Estimated fair value of senior notes | $ 300,800,000 |  |  |  |
Carrying value of senior subordinated notes | 295,500,000 |  |  |  |
Senior notes | 6.125% senior notes due in November 2023 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Debt, aggregate principal amount |  |  |  |  | $ 400,000,000
Debt instrument interest rate stated, percentage |  |  |  |  | 6.125%
Estimated fair value of senior notes | 424,200,000 |  | 427,900,000 | 421,400,000 |
Carrying value of senior subordinated notes | $ 395,400,000 |  | $ 395,200,000 | $ 394,600,000 |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: 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(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: 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 Reference 3: 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 + Details
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