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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) Share data in Millions, unless otherwise specified | 12 Months Ended
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Dec. 27, 2013 segment customer branch state | Dec. 28, 2012 | Dec. 30, 2011
Description of business [Abstract] |  |  |
Number of customers | 130,000 |  |
Number of network branches operated by the Company | 757 |  |
Number of states in which Company operates | 50 |  |
Segment reporting [Abstract] |  |  |
Number of reportable segments | 1 |  |
Percentage of revenue from international operations | 3.10% | 3.50% | 3.80%
Advertising costs [Abstract] |  |  |
Advertising expense | $ 4,000,000 | $ 3,700,000 | $ 3,600,000
Accounts receivable and allowance for doubtful accounts [Abstract] |  |  |
Allowance for doubtful accounts | $ 5,710,000 | $ 4,999,000 |
Shares outstanding [Abstract] |  |  |
Unvested restricted stock included in shares outstanding | 0.7 | 0.6 |
Buildings |  |  |
Plant and equipment [Abstract] |  |  |
Estimated useful life | 40 years |  |
Minimum | Computers and software |  |  |
Plant and equipment [Abstract] |  |  |
Estimated useful life | 3 years |  |
Minimum | Furniture and equipment |  |  |
Plant and equipment [Abstract] |  |  |
Estimated useful life | 3 years |  |
Maximum | Computers and software |  |  |
Plant and equipment [Abstract] |  |  |
Estimated useful life | 10 years |  |
Maximum | Furniture and equipment |  |  |
Plant and equipment [Abstract] |  |  |
Estimated useful life | 10 years |  |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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