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STOCK OPTIONS (Details) - Schedule of Share-based Compensation, Activity (USD $) | 12 Months Ended |  |
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Sep. 27, 2014 | Sep. 28, 2013 | Sep. 29, 2012
STOCK OPTIONS (Details) - Schedule of Share-based Compensation, Activity [Line Items] |  |  |  |  |
Options Outstanding, Number of Shares | 704,161 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | [1] | 623,100 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | [1] | 648,100 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options Outstanding, Weighted Average Exercise Price (in Dollars per share) | $ 21.66 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | [1] | $ 19.69 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | [1] | $ 19.56 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options Outstanding, Weighted Average Remaining contractual life | 5 years 255 days |  |  |  |
Options Exercisable, Number of Shares | 498,661 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber | [1] | 503,950 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber | [1] |
Options Exercisable, Weighted Average Exercise Price (in Dollars per share) | $ 21.31 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice | [1] | $ 20.95 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice | [1] |
Options Exercisable, Weighted Average Remaining contractual life | 4 years 36 days | [1] |  |  |
Range of Exercise Prices One [Member] |  |  |  |  |
STOCK OPTIONS (Details) - Schedule of Share-based Compensation, Activity [Line Items] |  |  |  |  |
Options Outstanding, Number of Shares | 96,361 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesOneMember |  |  |  |
Options Outstanding, Weighted Average Exercise Price (in Dollars per share) | $ 12.04 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesOneMember |  |  |  |
Options Outstanding, Weighted Average Remaining contractual life | 4 years 219 days |  |  |  |
Options Exercisable, Number of Shares | 96,361 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesOneMember |  |  |  |
Options Exercisable, Weighted Average Exercise Price (in Dollars per share) | $ 12.04 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesOneMember |  |  |  |
Options Exercisable, Weighted Average Remaining contractual life | 4 years 219 days |  |  |  |
Range Of Exercise Prices Two [Member] |  |  |  |  |
STOCK OPTIONS (Details) - Schedule of Share-based Compensation, Activity [Line Items] |  |  |  |  |
Options Outstanding, Number of Shares | 175,800 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesTwoMember |  |  |  |
Options Outstanding, Weighted Average Exercise Price (in Dollars per share) | $ 14.40 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesTwoMember |  |  |  |
Options Outstanding, Weighted Average Remaining contractual life | 7 years 255 days |  |  |  |
Options Exercisable, Number of Shares | 175,800 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesTwoMember |  |  |  |
Options Exercisable, Weighted Average Exercise Price (in Dollars per share) | $ 14.40 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesTwoMember |  |  |  |
Options Exercisable, Weighted Average Remaining contractual life | 7 years 255 days |  |  |  |
Range Of Exercise Prices Three [Member] |  |  |  |  |
STOCK OPTIONS (Details) - Schedule of Share-based Compensation, Activity [Line Items] |  |  |  |  |
Options Outstanding, Number of Shares | 205,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesThreeMember |  |  |  |
Options Outstanding, Weighted Average Exercise Price (in Dollars per share) | $ 22.50 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesThreeMember |  |  |  |
Options Outstanding, Weighted Average Remaining contractual life | 9 years 255 days |  |  |  |
Options Exercisable, Weighted Average Exercise Price (in Dollars per share) | $ 22.50 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesThreeMember |  |  |  |
Options Exercisable, Weighted Average Remaining contractual life | 9 years 255 days |  |  |  |
Range Of Exercise Prices Four [Member] |  |  |  |  |
STOCK OPTIONS (Details) - Schedule of Share-based Compensation, Activity [Line Items] |  |  |  |  |
Options Outstanding, Number of Shares | 136,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesFourMember |  |  |  |
Options Outstanding, Weighted Average Exercise Price (in Dollars per share) | $ 29.60 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesFourMember |  |  |  |
Options Outstanding, Weighted Average Remaining contractual life | 73 days |  |  |  |
Options Exercisable, Number of Shares | 136,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesFourMember |  |  |  |
Options Exercisable, Weighted Average Exercise Price (in Dollars per share) | $ 29.60 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesFourMember |  |  |  |
Options Exercisable, Weighted Average Remaining contractual life | 73 days |  |  |  |
Range of Exercise Prices Five [Member] |  |  |  |  |
STOCK OPTIONS (Details) - Schedule of Share-based Compensation, Activity [Line Items] |  |  |  |  |
Options Outstanding, Number of Shares | 90,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesFiveMember |  |  |  |
Options Outstanding, Weighted Average Exercise Price (in Dollars per share) | $ 32.15 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesFiveMember |  |  |  |
Options Outstanding, Weighted Average Remaining contractual life | 2 years 73 days |  |  |  |
Options Exercisable, Number of Shares | 90,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesFiveMember |  |  |  |
Options Exercisable, Weighted Average Exercise Price (in Dollars per share) | $ 32.15 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / arkr_RangeOfExercisePriceAxis = arkr_RangeOfExercisePricesFiveMember |  |  |  |
Options Exercisable, Weighted Average Remaining contractual life | 2 years 73 days |  |  |  |
[1] | Options become exercisable at various times and expire at various dates through 2024.

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- Definition Weighted average remaining contractual term for option awards exercisable, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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