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Provision For Income Taxes (Tables)
12 Months Ended
Dec. 29, 2023
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
Our income before income taxes is derived solely from within the U.S. Our provision for income taxes was as follows (in thousands):
 
Year Ended December 31,
 
202320222021
Current:
Federal$167,954 $100,525 $11,338 
State15,011 11,903 5,224 
Total current tax expense$182,965 $112,428 $16,562 
Deferred:
Federal$(123,486)$(54,223)$46,416 
State(9,723)(6,135)113 
Total deferred tax (benefit) expense(133,209)(60,358)46,529 
Provision for income taxes$49,756 $52,070 $63,091 
Schedule of Reconciliation of Income Taxes At The Statutory Federal Income Tax Rate to Net Income Taxes
The reconciliation of the U.S. federal income tax provision at the statutory federal income tax rate of 21% for each of the years ended December 31, 2023, 2022 and 2021, respectively, to our provision for income taxes was as follows (in thousands):
 
Year Ended December 31,
 
202320222021
U.S. federal income tax provision at statutory rate$54,080 $49,213 $61,772 
State tax (benefit) expense (1,487)(2,632)1,336 
Change in valuation allowance5,770 7,162 2,883 
Research credits(23,714)(14,130)(6,263)
Stock-based compensation1,066 (2,864)(11,831)
Non-deductible executive compensation7,019 4,549 11,182 
Branded prescription drug fee4,968 3,855 2,897 
Non-deductible warrant purchase— 6,300 — 
Other2,054 617 1,115 
Provision for income taxes$49,756 $52,070 $63,091 
Schedule of Deferred Assets and Liabilities
Our deferred tax assets and liabilities were as follows (in thousands):
 
December 31,
 
20232022
Deferred tax assets:
Net operating loss carryforwards$29,512 $33,635 
Tax credit carryforwards39,640 40,217 
Depreciation and amortization313,679 176,208 
Stock-based compensation24,592 27,531 
Lease liabilities49,971 46,759 
Accruals and reserves not currently deductible30,068 22,418 
Other assets10,730 14,402 
Total deferred tax assets498,192 361,170 
Valuation allowance(83,001)(77,230)
Net deferred tax assets415,191 283,940 
Deferred tax liabilities:
Lease right-of-use assets(54,046)(52,830)
Net deferred taxes$361,145 $231,110 
Schedule of Unrecognized Tax Benefits
The following table summarizes the activity related to our unrecognized tax benefits (in thousands):
 
Year Ended December 31,
 
202320222021
Beginning balance$87,706 $83,583 $80,941 
Change relating to prior year provision631 715 728 
Change relating to current year provision32,137 4,129 2,215 
Reductions based on the lapse of the applicable statutes of limitations(4,708)(721)(301)
Ending balance$115,766 $87,706 $83,583