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Summary of AOCI exclusive of reclassification (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax | $ 2,978 | $ (6,789) | $ 5,730
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax | (16,853) | (9,426) | 1,717
Derivative Instruments |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Net change in fair value of derivatives | 3,984 | (9,734) | 9,316
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments tax benefit | (1,006) | 2,945 | (3,586)
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax | 2,978 | (6,789) | 5,730
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax | 2,978 | (6,789) |
Current Year Actuarial Loss |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Current year, before tax | (26,528) | (4,307) | (6,525)
Accumulated Defined Benefit Plans Adjustment |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Current year, before tax | (26,528) | (4,307) | (6,525)
Amount of Gain (Loss) Recognized in AOCI, Current year, tax benefit | 6,697 | 1,670 | 2,512
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax | (19,831) | (2,637) | (4,013)
Interest Rate Contracts |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax |  |  | 666
Interest Rate Contracts | Derivative Instruments |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Net change in fair value of derivatives |  |  | 1,083
Commodity Contract |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax | 2,978 | (6,789) | 5,064
Commodity Contract | Derivative Instruments |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Net change in fair value of derivatives | $ 3,984 | $ (9,734) | $ 8,233

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