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Long-Term Borrowings (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 3 Months Ended | 12 Months Ended |  | 3 Months Ended | 12 Months Ended |  | 3 Months Ended |
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Sep. 24, 2011 | Sep. 25, 2010 | Sep. 26, 2009 | Mar. 27, 2010 Senior Notes Due 2020 [Member] | Sep. 24, 2011 Senior Notes Due 2020 [Member] | Sep. 25, 2010 Senior Notes Due 2020 [Member] | Mar. 27, 2010 Senior Notes Due 2013 [Member] | Sep. 24, 2011 Revolving Credit Facility [Member] | Sep. 24, 2011 Revolving Credit Facility Due 2013 [Member] | Sep. 25, 2010 Revolving Credit Facility Due 2013 [Member] | Mar. 27, 2010 Term Loan Due 2010 [Member] | Mar. 27, 2010 Working Capital Facility Due 2010 [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt | $ 348,169 | $ 347,953 |  |  | $ 248,169 | $ 247,953 |  |  | $ 100,000 | $ 100,000 |  |
Stated interest rate (in hundredths) |  |  |  |  | 7.375% |  | 6.875% |  |  |  |  |
Maturity date |  |  |  |  | Mar. 15, 2020 |  |  | Jun. 25, 2013 |  |  |  |
Net unamortized discount |  |  |  |  | 1,831 | 2,047 |  |  |  |  |  |
Date public offering completed |  |  |  | 2010-03-23 |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  | 250,000 |  |  |  |  |  |  |  |
Percentage of principal amount at which debt was issued (in hundredths) |  |  |  | 99.136% |  |  |  |  |  |  |  |
Loss on the extinguishment of debt, total | 0 | (9,473) | (4,624) |  |  |  | 9,473 |  |  |  |  |
Loss on the extinguishment of debt related to repurchase premium and related fees |  |  |  |  |  |  | 7,231 |  |  |  |  |
Loss on the extinguishment of debt related to write-off in unamortized debt origination costs and unamortized discount |  |  |  |  |  |  | 2,242 |  |  |  |  |
Percentage of the principal amount repurchase offer under change of control provision (in hundredths) |  |  |  |  | 101.00% |  |  |  |  |  |  |
Number of days after the consummation of the change of control that a rating decline may occur to trigger offer to repurchase debt (in days) |  |  |  |  | 90D |  |  |  |  |  |  |
Revolving Credit Facility, maximum amount |  |  |  |  |  |  |  | 250,000 |  |  | 108,000 | 175,000
Revolving Credit Facility, term (in years) |  |  |  |  |  |  |  | 4 |  |  |  |
Standby letters of credit issued under the Revolving Credit Facility |  |  |  |  |  |  |  | 54,856 |  |  |  |
Available borrowing capacity under Revolving Credit Facility |  |  |  |  |  |  |  | 95,144 |  |  |  |
Revolving Credit Facility, interest rate description |  |  |  |  |  |  |  | Borrowings under the Revolving Credit Facility bear interest at prevailing interest rates based upon, at the Operating Partnership's option, LIBOR plus the applicable margin or the base rate, defined as the higher of the Federal Funds Rate plus ½ of 1, the agent bank's prime rate, or LIBOR plus 1, plus in each case the applicable margin. |  |  |  |
Revolving Credit Facility, approximate interest rate at period end (in hundredths) |  |  |  |  |  |  |  | 3.25% |  |  |  |
Debt origination costs [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Capitalized debt origination costs | 7,207 | 9,157 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Credit facility borrowings |  |  |  |  |  |  |  |  | 100,000 |  |  |
Credit facility repayments |  |  |  |  |  |  |  |  |  |  | 108,000 |
Revolving Credit Facility and 2020 Senior Notes covenants [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Consolidated interest coverage ratio, minimum | 2.5 to 1.0 |  |  |  |  |  |  |  |  |  |  |
Total consolidated leverage ratio, maximum | 4.5 to 1.0 |  |  |  |  |  |  |  |  |  |  |
Senior secured consolidated leverage ratio, maximum | 3.0 to 1.0 |  |  |  |  |  |  |  |  |  |  |
Consolidated fixed charge coverage ratio, minimum | 1.75 to 1 |  |  |  |  |  |  |  |  |  |  |
Interest rate swap agreement [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Effective date | Mar. 31, 2010 |  |  |  |  |  |  |  |  |  |  |
Termination date | Jun. 25, 2013 |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate (in hundredths) | 3.12% |  |  |  |  |  |  |  |  |  |  |
Long-term debt maturities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt maturities, 2012 | 0 |  |  |  |  |  |  |  |  |  |  |
Long-term debt maturities, 2013 | 100,000 |  |  |  |  |  |  |  |  |  |  |
Long-term debt maturities, 2014 | 0 |  |  |  |  |  |  |  |  |  |  |
Long-term debt maturities, 2015 | 0 |  |  |  |  |  |  |  |  |  |  |
Long-term debt maturities, 2016 and thereafter | $ 250,000 |  |  |  |  |  |  |  |  |  |  |

X
- Definition The indenture governing the 2020 Senior Notes, requires the Partnership's consolidated fixed charge coverage ratio, as defined, to exceed a minimum ratio to permit the Partnership to make cash distributions equal to available cash, as defined, as of the end of the immediately preceding quarter, if no event of default exists or would exist upon making such distributions. + Details
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- Definition Number of days following a change of control, as defined in the indenture, that a rating decline (a decrease in the rating of the notes by either Moody's Investors Service or Standard and Poor's Rating group by one or more gradations) can occur to trigger repurchase offer. + Details
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- Definition The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + Details
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- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + Details
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- Definition Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 26 -Paragraph 20, 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of long-term debt maturing in year four following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of long-term debt maturing in year three following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of long-term debt maturing in year two following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: 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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