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Other Assets - Narrative (Detail) (USD $) |  |  |  |  |  |  |  | 3 Months Ended |  |  | 3 Months Ended |  | 1 Months Ended |  |  |  |
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Aug. 03, 2014 Contract | May 16, 2014 | Apr. 27, 2014 Contract | Jul. 28, 2013 Contract | Aug. 03, 2014 After Settlement of Life Insurance Agreement [Member] Contract | Aug. 03, 2014 Other assets [Member] | Apr. 27, 2014 Other assets [Member] | Jul. 28, 2013 Other assets [Member] | Aug. 03, 2014 Other assets [Member] Non-compete Agreement [Member] | Jul. 28, 2013 Other assets [Member] Non-compete Agreement [Member] | Apr. 27, 2014 Other assets [Member] Non-compete Agreement [Member] | Aug. 03, 2014 Other assets [Member] Asset Purchase Agreement Dated August 11, 2008 [Member] | Aug. 03, 2014 Other assets [Member] Asset Purchase Agreement Dated May 8, 2013 [Member] | Aug. 03, 2014 Other assets [Member] Customer Relationships [Member] | Jul. 28, 2013 Other assets [Member] Customer Relationships [Member] | Apr. 27, 2014 Other assets [Member] Customer Relationships [Member] | Sep. 12, 2014 Other Current Assets [Member] Subsequent Event [Member] | Aug. 03, 2014 Other Noncurrent Assets [Member] | Apr. 27, 2014 Other Noncurrent Assets [Member] | Jul. 28, 2013 Other Noncurrent Assets [Member] | Aug. 03, 2014 Other Noncurrent Assets [Member] After Settlement of Life Insurance Agreement [Member]
Other Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  |  |  |  | 15 years |  |  |  |  | 17 years |  |  |  |  |  |  |
Gross carrying amount of non-compete agreement |  |  |  |  |  | $ 2,000,000 | $ 2,000,000 | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated amortization |  |  |  |  |  |  |  |  | 1,000,000 | 958,000.0 | 1,000,000 |  |  | 64,000 | 13,000 | 51,000 |  |  |  |  |
Non-compete agreement carrying amount |  |  |  |  |  |  |  |  |  |  |  | 227,000 | 808,000 |  |  |  |  | 1,035,000 | 1,041,000 | 1,061,000 |
Amortization expense |  |  |  |  |  |  |  |  | 19,000 | 19,000 |  |  |  | 13,000 | 13,000 |  |  |  |  |  |
Remaining amortization expense for the next fiscal year |  |  |  |  |  |  |  |  | 56,000 |  |  |  |  | 38,000 |  |  |  |  |  |  |
Remaining amortization expense for the second fiscal year |  |  |  |  |  |  |  |  | 75,000 |  |  |  |  | 51,000 |  |  |  |  |  |  |
Remaining amortization expense for the third fiscal year |  |  |  |  |  |  |  |  | 75,000 |  |  |  |  | 51,000 |  |  |  |  |  |  |
Remaining amortization expense for the fourth fiscal year |  |  |  |  |  |  |  |  | 75,000 |  |  |  |  | 51,000 |  |  |  |  |  |  |
Remaining amortization expense for the fifth fiscal year |  |  |  |  |  |  |  |  | 75,000 |  |  |  |  | 51,000 |  |  |  |  |  |  |
Remaining amortization expense for the fiscal year thereafter |  |  |  |  |  |  |  |  | 679,000 |  |  |  |  | 562,000 |  |  |  |  |  |  |
Weighted average remaining amortization period |  |  |  |  |  |  |  |  | 13 years 9 months 18 days |  |  |  |  | 15 years 9 months 18 days |  |  |  |  |  |  |
Gross carrying amount of customer relationships |  |  |  |  |  | 868,000 | 868,000 | 868,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Death benefits to beneficiary of insured on terminated life insurance agreement |  | 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collection of cash surrender value from termination of split dollar life insurance agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 320,000 |  |  |  |
Number of life insurance contracts owned | 2 |  | 2 | 2 | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Life insurance contracts, death benefits to insured | 3,900,000 |  | 3,900,000 | 3,900,000 | 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Life insurance contracts, cash surrender value | $ 640,000 |  | $ 644,000 | $ 622,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 320,000 | $ 644,000 | $ 622,000 | $ 320,000

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- Definition The aggregate amount of death benefits the beneficiaries would receive under the terms of life insurance contracts in force as of the reporting date. + References No definition available. + Details
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- Definition The cash received during the period from termination of a life insurance contract or contracts owned wholly or partially by the entity. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 + Details
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- Definition Gross carrying amount before accumulated amortization as of the balance sheet date to an asset acquired in a business combination representing a favorable existing relationship with customers having a finite beneficial life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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