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GOODWILL AND INTANGIBLE ASSETS - Changes in Carrying Amount of Goodwill (Details) (USD $) | 12 Months Ended
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Dec. 27, 2013
Goodwill, gross |  |
Balance at December 28, 2012 | $ 94,300,000 |
Goodwill acquired year to date | 34,100,000 | [1]
Balance at December 27, 2013 | 128,400,000 |
Accumulated Impairment Losses |  |
Balance at December 28, 2012 | (46,200,000) |
Balance at December 27, 2013 | (46,200,000) |
Goodwill |  |
Balance at December 28, 2012 | 48,079,000 |
Goodwill acquired year to date | 34,100,000 | [1]
Balance at December 27, 2013 | $ 82,239,000 |
[1] | Goodwill acquired includes $25.7 million, $0.8 million, and $7.6 million due to the acquisitions of MDT, CTS, and TWC, respectively.

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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