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Other Assets - Narrative (Detail) (USD $) | 3 Months Ended | 6 Months Ended |  |  |  |  |  |  |  | 6 Months Ended |  | 6 Months Ended |
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Nov. 02, 2014 Contract | Nov. 02, 2014 Contract | May 16, 2014 | Apr. 27, 2014 Contract | Oct. 27, 2013 Contract | Nov. 02, 2014 Other assets [Member] | Apr. 27, 2014 Other assets [Member] | Oct. 27, 2013 Other assets [Member] | Nov. 02, 2014 Other assets [Member] Asset Purchase Agreement Dated August 11, 2008 [Member] | Nov. 02, 2014 Other assets [Member] Asset Purchase Agreement Dated May 8, 2013 [Member] | Nov. 02, 2014 Other assets [Member] Customer Relationships [Member] | Oct. 27, 2013 Other assets [Member] Customer Relationships [Member] | Apr. 27, 2014 Other assets [Member] Customer Relationships [Member] | Nov. 02, 2014 Other assets [Member] Non-compete Agreement [Member] | Oct. 27, 2013 Other assets [Member] Non-compete Agreement [Member] | Apr. 27, 2014 Other assets [Member] Non-compete Agreement [Member]
Other Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  |  |  |  |  |  | 17 years |  |  | 15 years |  |
Gross carrying amount of non-compete agreement |  |  |  |  |  | $ 2,000,000 | $ 2,000,000 | $ 2,000,000 |  |  |  |  |  |  |  |
Accumulated amortization |  |  |  |  |  |  |  |  |  |  | 77,000 | 26,000 | 51,000 | 1,000,000 | 1,000,000 | 1,000,000
Non-compete agreement carrying amount | 1,017,000 | 1,017,000 |  | 1,041,000 | 1,054,000 |  |  |  | 223,000 | 794,000 |  |  |  |  |  |
Amortization expense |  |  |  |  |  |  |  |  |  |  | 26,000 | 26,000 |  | 38,000 | 38,000 |
Remaining amortization expense for the fiscal year |  |  |  |  |  |  |  |  |  |  | 25,000 |  |  | 38,000 |  |
Remaining amortization expense for the second fiscal year |  |  |  |  |  |  |  |  |  |  | 51,000 |  |  | 75,000 |  |
Remaining amortization expense for the third fiscal year |  |  |  |  |  |  |  |  |  |  | 51,000 |  |  | 75,000 |  |
Remaining amortization expense for the fourth fiscal year |  |  |  |  |  |  |  |  |  |  | 51,000 |  |  | 75,000 |  |
Remaining amortization expense for the fifth fiscal year |  |  |  |  |  |  |  |  |  |  | 51,000 |  |  | 75,000 |  |
Remaining amortization expense for the fiscal year thereafter |  |  |  |  |  |  |  |  |  |  | 562,000 |  |  | 679,000 |  |
Weighted average remaining amortization period |  |  |  |  |  |  |  |  |  |  | 15 years 6 months |  |  | 13 years 6 months |  |
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 | 320,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of life insurance contracts owned | 1 | 1 |  | 2 | 2 |  |  |  |  |  |  |  |  |  |  |
Life insurance contracts, death benefits to insured | 1,400,000 | 1,400,000 |  | 3,900,000 | 3,900,000 |  |  |  |  |  |  |  |  |  |  |
Life insurance contracts, cash surrender value | $ 320,000 | $ 320,000 |  | $ 644,000 | $ 649,000 |  |  |  |  |  |  |  |  |  |  |

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- Definition The amount of proceeds the beneficiary would have received, had the policy not been terminated, upon the death of the insured. + References No definition available. + Details
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