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EMPLOYEE BENEFIT PLANS (Tables) | 12 Months Ended
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Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract] |
Reconciliation of Benefit Obligations and Plans Assets of the Company's Pension Plans | The following table provides a reconciliation of benefit obligations and plan assets of the Company’s pension, DCP and ESLIRP plans:
| December 31, 2016 |  | December 26, 2015
| (in thousands)
Change in projected benefit obligations: |  |  |  |  |
Benefit obligation at beginning of year | $ | 345,220 |  |  | $ | 359,130 |
Service cost | 2,453 |  |  | 4,293 |
Interest cost | 12,046 |  |  | 12,974 |
Benefit payments | (13,383 | ) |  | (8,191 | )
Curtailment | (279 | ) |  | — |
Settlements | (5,499 | ) |  | — |
Plan amendments | 188 |  |  | — |
Transfer in from acquisition | 5,271 |  |  | — |
Actuarial loss (gain) | 71,006 |  |  | (10,362 | )
Administrative expenses paid | (605 | ) |  | (411 | )
Effect of foreign exchange | (36,476 | ) |  | (12,213 | )
Benefit obligation at end of year | $ | 379,942 |  |  | $ | 345,220 |
Change in fair value of plan assets: |  |  |
Fair value of plan assets at beginning of year | $ | 275,480 |  |  | $ | 281,290 |
Actual return on plan assets | 23,388 |  |  | 6,263 |
Employer contributions | 10,551 |  |  | 6,762 |
Settlements | (5,499 | ) |  | — |
Transfer in from acquisition | 508 |  |  | — |
Benefit payments | (13,383 | ) |  | (8,191 | )
Administrative expenses paid | (605 | ) |  | (411 | )
Effect of foreign exchange | (33,537 | ) |  | (10,233 | )
Fair value of plan assets at end of year | $ | 256,903 |  |  | $ | 275,480 |
Net balance sheet liability | $ | 123,039 |  |  | $ | 69,740 |
Amounts recognized in balance sheet: |  |  |
Noncurrent assets | $ | — |  |  | $ | 261 |
Current liabilities | 1,120 |  |  | 6,133 |
Noncurrent liabilities | 121,919 |  |  | 63,868 |
Amounts Recognized in Accumulated Other Comprehensive Loss Related to the Company's Pensions Plans | Amounts recognized in accumulated other comprehensive loss related to the Company’s pension, DCP and ESLIRP plans are as follows:
| Fiscal Year
| 2016 |  | 2015
| (in thousands)
Net actuarial loss | $ | 123,743 |  |  | $ | 73,412 |
Net prior service cost (credit) | (3,300 | ) |  | (4,584 | )
Net amount recognized | $ | 120,443 |  |  | $ | 68,828 |
Accumulated Benefit Obligation and Fair of Plan Assets | The accumulated benefit obligation and fair value of plan assets for the Company’s pension, DCP and ESLIRP plans with accumulated benefit obligations in excess of plan assets are as follows:
| December 31, 2016 |  | December 26, 2015
| (in thousands)
Accumulated benefit obligation | $ | 346,122 |  |  | $ | 306,433 |
Fair value of plan assets | 242,172 |  |  | 253,225 |
Projected Benefit Obligation and Fair Value of Plan Assets | The projected benefit obligation and fair value of plan assets for the Company’s pension, DCP and ESLIRP plans with projected benefit obligations in excess of plan assets are as follows:
| December 31, 2016 |  | December 26, 2015
| (in thousands)
Projected benefit obligation | $ | 379,942 |  |  | $ | 336,155 |
Fair value of plan assets | 256,903 |  |  | 266,154 |
Amounts in Accumulated Other Comprehensive Income Expected to Be Recognized as Components of Net Periodic Benefit Cost Over the Next Fiscal Year | The amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost over the next fiscal year are as follows:
| December 31, 2016
| (in thousands)
Amortization of net actuarial loss | $ | 3,867 |
Amortization of net prior service credit | (475 | )
Components of Net Periodic Benefit Costs for the Company's Pension Plans | Components of net periodic benefit cost for the Company’s pension, DCP and ESLIRP plans are as follows:
| Fiscal Year
| 2016 |  | 2015 |  | 2014
| (in thousands)
Service cost | $ | 2,453 |  |  | $ | 4,293 |  |  | $ | 4,155 |
Interest cost | 12,046 |  |  | 12,974 |  |  | 13,831 |
Expected return on plan assets | (14,164 | ) |  | (16,987 | ) |  | (17,444 | )
Amortization of prior service cost (credit) | (292 | ) |  | (581 | ) |  | 1,211 |
Amortization of net loss (gain) | 2,003 |  |  | 3,198 |  |  | 23 |
Curtailment | (279 | ) |  | — |  |  | — |
Settlements | 788 |  |  | — |  |  | — |
Net periodic cost (benefit) | $ | 2,555 |  |  | $ | 2,897 |  |  | $ | 1,776 |
Weighted-average Assumptions | Weighted-average assumptions used to determine projected benefit obligations are as follows:
| December 31, 2016 |  | December 26, 2015
Discount rate | 3.01 | % |  | 3.89 | %
Rate of compensation increase | 3.25 | % |  | 3.17 | %
Weighted-average assumptions used to determine net periodic benefit cost are as follows:
| December 31, 2016 |  | December 26, 2015 |  | December 27, 2014
Discount rate | 3.89 | % |  | 3.75 | % |  | 4.44 | %
Expected long-term return on plan assets | 5.83 | % |  | 6.24 | % |  | 6.41 | %
Rate of compensation increase | 3.17 | % |  | 3.18 | % |  | 3.36 | %
Fair Value of the Company's Pension Plan Assets by Asset Category | The fair value of the Company’s pension plan assets by asset category are as follows:
| December 31, 2016 |  | December 26, 2015
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
| (in thousands)
Cash | $ | 108 |  |  | $ | — |  |  | $ | — |  |  | $ | 108 |  |  | $ | 92 |  |  | $ | — |  |  | $ | — |  |  | $ | 92 |
Equity securities(1) | 63,348 |  |  | 6,252 |  |  | — |  |  | 69,600 |  |  | 65,890 |  |  | 5,941 |  |  | — |  |  | 71,831 |
Debt securities(2) | 59,294 |  |  | 3,269 |  |  | — |  |  | 62,563 |  |  | 68,489 |  |  | 2,822 |  |  | — |  |  | 71,311 |
Mutual funds(3) | 64,698 |  |  | 56,596 |  |  | — |  |  | 121,294 |  |  | 63,689 |  |  | 65,725 |  |  | — |  |  | 129,414 |
Other | 1,318 |  |  | 586 |  |  | 1,434 |  |  | 3,338 |  |  | 1,021 |  |  | 49 |  |  | 1,762 |  |  | 2,832 |
Total | $ | 188,766 |  |  | $ | 66,703 |  |  | $ | 1,434 |  |  | $ | 256,903 |  |  | $ | 199,181 |  |  | $ | 74,537 |  |  | $ | 1,762 |  |  | $ | 275,480 |
(1) This category comprises equity securities held by non-U.S. pension plans valued at the quoted closing price, and translated into U.S. dollars using a foreign currency exchange rate at year end.
(2) This category comprises debt securities held by non-U.S. pension plans valued at the quoted closing price, and translated into U.S. dollars using a foreign currency exchange rate at year end.
(3) This category comprises mutual funds valued at the net asset value of shares held at year end.
Estimated Future Benefit Payments Over the Next Five Years | Estimated future benefit payments during the next five years and in the aggregate for fiscal years thereafter, are as follows:
Fiscal Year |  | Pension Plans
|  | (in thousands)
2017 |  | $ | 8,610 |
2018 |  | 8,818 |
2019 |  | 9,682 |
2020 |  | 10,014 |
2021 |  | 30,717 |
Thereafter |  | 57,705 |

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