Income Taxes	9 Months Ended
Income Taxes	Sep. 26, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate for the three months ended September 26, 2020, and September 28, 2019, was 22.3 percent and (3.6) percent, respectively. Our effective tax rate for the three months ended September 26, 2020, was impacted by the permanent addback of certain nondeductible expenses, including meals and entertainment and officer’s compensation, and the effect of the partial valuation allowance for separate company state income tax losses and previously nondeductible interest under 163(j) of the Internal Revenue Code (“IRC”). Our effective tax rate for the three months ended September 28, 2019, was impacted by the permanent addback of certain nondeductible expenses, including meals and entertainment and executive compensation, and the effect of the partial valuation allowance for separate company state income tax losses and consolidated interest expense limitation, including $0.6 million in discrete tax expense related to prior periods. In addition, we recorded discrete tax expense of $0.2 million for a shortfall on the vesting of our restricted stock units, which was offset by a $0.2 million discrete tax benefit for claiming tax credits. Our effective tax rate was 18.9 percent and (0.9) percent, for the first nine months of fiscal 2020 and 2019, respectively. Our effective tax rate for the nine months ended September 26, 2020, was impacted by (i) the discrete tax benefit of $3.9 million resulting from the release of the valuation allowance associated with the nondeductible interest expense under Section 163(j) of the IRC as a result of changes under the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act (which was enacted on March 27, 2020, and contained, among other things, several tax-based measures meant to counteract the effects of the COVID-19 pandemic) to increase the allowable percentage from 30 percent of adjusted taxable income to 50 percent of adjusted taxable income, (ii) recording discrete tax expense of $0.4 million for a shortfall on the vesting of our restricted stock units, (iii) the permanent addback of certain nondeductible expenses, including meals and entertainment and nondeductible compensation, and (iv) the effect of the partial valuation allowance for separate company state income tax losses and previously nondeductible interest expense under Section 163(j) of the IRC. Our effective tax rate for the nine months ended September 28, 2019, was impacted by the permanent addback of certain nondeductible expenses, including meals and entertainment and executive compensation and the effect of the valuation allowance for separate company state income tax losses and consolidated interest expense limitation, including $0.6 million in discrete tax expense related to prior periods. In addition, during the first nine months of fiscal 2019, we recorded discrete tax expense of $0.2 million for a shortfall on vesting of our restricted stock units, which was offset by a $0.2 million discrete tax benefit for claiming state tax credits. Our financial statements contain certain deferred tax assets which primarily resulted from tax benefits associated with temporary differences related to certain reserves, pension obligations, differences between book and tax depreciation and amortization, realized gains upon the sales of real estate, and both federal and state net operating losses. Currently, we have a valuation allowance that covers (i) certain company state net operating loss carryforwards and (ii) disallowed interest calculated pursuant to the changes made by the Tax Cuts and Jobs Act of 2017, as adjusted by the CARES Act. We record a valuation allowance against our net deferred tax assets when we determine that, based on the weight of available evidence, it is more likely than not that our net deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences can be carried forward under tax law. At the end of each quarter, we evaluate the weight of available evidence (both positive and negative). We considered the recent reported income generated in the current quarter and prior years (adjusted for unusual one-time items) and income generated in 2017, including the prior year income from Cedar Creek. We also considered evidence related to the four sources of taxable income to determine whether such positive evidence outweighed the negative evidence. The evidence considered included: •future reversals of existing taxable temporary differences; •future taxable income exclusive of reversing temporary differences and carryforwards; •taxable income in prior carryback years if carryback is permitted under the tax law; and •tax planning strategies. At the end of the 2020 and 2019 fiscal third quarters, in our evaluation of the weight of available evidence, we concluded that the weight of the positive evidence outweighed the negative evidence. In addition to the evidence discussed above, we considered as positive evidence forecasted future taxable income, the detail scheduling of the timing of the reversal of our deferred tax assets and liabilities, and the evidence from business and tax planning strategies described below. Although we believe our estimates are reasonable, the ultimate determination of the appropriate amount of valuation allowance involves significant judgments. One of our long-standing deferred tax assets has been our net operating losses for federal income tax purposes. With our real estate sales discussed in Note 8 and our net income during the first nine months of 2020, we believe we will fully utilize all of our remaining federal net operating losses upon filing of our 2020 federal income tax return in 2021. In addition, we believe that the change in control under IRC Section 382 resulting from the completion of the secondary offering on October 23, 2017, will not cause any of our federal net operating losses to be limited as we have effectively implemented a real estate strategy involving the sale and leaseback of real estate. Those sale and leaseback transactions involved four warehouses in January 2018, two warehouses during 2019, and fifteen warehouses in 2020. Additionally, the acquisition of Cedar Creek did not generate any limitations under IRC Section 382 on Cedar Creek’s tax assets.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.