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Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 23, 2020 | Sep. 25, 2019 | Sep. 23, 2020 | Sep. 25, 2019
Statement of Comprehensive Income [Abstract] |  |  |  |
Tax effect of minimum pension liability adjustment | $ 5 | $ 6 | $ 17 | $ 17
Changes in fair value of cash flow derivatives, tax | 151 | (5,251) | (12,416) | (13,574)
Reclassification of cash flow derivatives to interest expense, tax | 121 | 21 | 541 | 11
Reclassification of loss related to dedesignation of derivatives to other nonoperating expense (income), tax | 0 | 0 | 1,892 | 0
Reclassification of unrealized losses related to derivatives to interest expense, tax | $ 73 | $ 0 | $ 142 | $ 0

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- Definition Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580 + Details
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