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EMPLOYEE BENEFIT PLANS - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 30, 2017 | Dec. 31, 2016 | Dec. 26, 2015
Defined Benefit Plan Disclosure [Line Items] |  |  |
Deferral period | 3 years |  |
Maximum annual contributions per employee, percent | 10.00% |  |
Period of highest consecutive years of compensation | 5 years |  |
Costs associated with deferred compensation plan and executive supplemental life insurance retirement plans | $ 2,300 | $ 2,200 | $ 2,600
Life insurance policies | $ 34,008 | 29,456 |
Sensitivity of expected rate of return on plan assets, percent change | 0.50% |  |
Sensitivity of change in expected rate of return, annual pension expense amount | $ 1,500 |  |
Employer contributions | 5,165 | 10,551 |
Expected employer contributions in 2018 | 7,600 |  |
Accumulated benefit obligation | 1,400 | 1,200 |
Costs associated with employee savings plan | $ 11,600 | $ 6,200 | $ 5,300
Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Weighted average target plan asset allocations | 45.00% |  |
Fixed Income Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Weighted average target plan asset allocations | 17.90% |  |
Other Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Weighted average target plan asset allocations | 37.10% |  |
Pension Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | $ 4,100 |  |

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