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INCOME PER SHARE OF COMMON STOCK (Details) (USD $) | 12 Months Ended
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Sep. 27, 2014 | Sep. 28, 2013
Exercise Price One [Member] |  |
INCOME PER SHARE OF COMMON STOCK (Details) [Line Items] |  |
Dilutive Securities Included In Computation Of Earnings Per Share Amount | 96,361 arkr_DilutiveSecuritiesIncludedInComputationOfEarningsPerShareAmount / arkr_ExercisePriceAxis = arkr_ExercisePriceOneMember | 158,300 arkr_DilutiveSecuritiesIncludedInComputationOfEarningsPerShareAmount / arkr_ExercisePriceAxis = arkr_ExercisePriceOneMember
Exercise Price Of Common Stock Options Included In Computation Of Earnings Per Share | $ 12.04 arkr_ExercisePriceOfCommonStockOptionsIncludedInComputationOfEarningsPerShare / arkr_ExercisePriceAxis = arkr_ExercisePriceOneMember | $ 12.04 arkr_ExercisePriceOfCommonStockOptionsIncludedInComputationOfEarningsPerShare / arkr_ExercisePriceAxis = arkr_ExercisePriceOneMember
Exercise Price Two [Member] |  |
INCOME PER SHARE OF COMMON STOCK (Details) [Line Items] |  |
Dilutive Securities Included In Computation Of Earnings Per Share Amount | 175,800 arkr_DilutiveSecuritiesIncludedInComputationOfEarningsPerShareAmount / arkr_ExercisePriceAxis = arkr_ExercisePriceTwoMember | 238,300 arkr_DilutiveSecuritiesIncludedInComputationOfEarningsPerShareAmount / arkr_ExercisePriceAxis = arkr_ExercisePriceTwoMember
Exercise Price Of Common Stock Options Included In Computation Of Earnings Per Share | $ 14.40 arkr_ExercisePriceOfCommonStockOptionsIncludedInComputationOfEarningsPerShare / arkr_ExercisePriceAxis = arkr_ExercisePriceTwoMember | $ 14.40 arkr_ExercisePriceOfCommonStockOptionsIncludedInComputationOfEarningsPerShare / arkr_ExercisePriceAxis = arkr_ExercisePriceTwoMember
Exercise Price Three [Member] |  |
INCOME PER SHARE OF COMMON STOCK (Details) [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 136,500 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / arkr_ExercisePriceAxis = arkr_ExercisePriceThreeMember | 136,500 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / arkr_ExercisePriceAxis = arkr_ExercisePriceThreeMember
Exercise Price Of Common Stock Options Excluded From Computation Of Earnings Per Share | $ 29.60 arkr_ExercisePriceOfCommonStockOptionsExcludedFromComputationOfEarningsPerShare / arkr_ExercisePriceAxis = arkr_ExercisePriceThreeMember | $ 29.60 arkr_ExercisePriceOfCommonStockOptionsExcludedFromComputationOfEarningsPerShare / arkr_ExercisePriceAxis = arkr_ExercisePriceThreeMember
Exercise Price Four [Member] |  |
INCOME PER SHARE OF COMMON STOCK (Details) [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 90,000 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / arkr_ExercisePriceAxis = arkr_ExercisePriceFourMember | 90,000 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / arkr_ExercisePriceAxis = arkr_ExercisePriceFourMember
Exercise Price Of Common Stock Options Excluded From Computation Of Earnings Per Share | $ 32.15 arkr_ExercisePriceOfCommonStockOptionsExcludedFromComputationOfEarningsPerShare / arkr_ExercisePriceAxis = arkr_ExercisePriceFourMember | $ 32.15 arkr_ExercisePriceOfCommonStockOptionsExcludedFromComputationOfEarningsPerShare / arkr_ExercisePriceAxis = arkr_ExercisePriceFourMember
Exercise Price Five [Member] |  |
INCOME PER SHARE OF COMMON STOCK (Details) [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 205,500 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / arkr_ExercisePriceAxis = arkr_ExercisePriceFiveMember |
Exercise Price Of Common Stock Options Excluded From Computation Of Earnings Per Share | $ 22.50 arkr_ExercisePriceOfCommonStockOptionsExcludedFromComputationOfEarningsPerShare / arkr_ExercisePriceAxis = arkr_ExercisePriceFiveMember |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References No definition available. + Details
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