Marketable Securities - Schedule of Gross Unrealized Losses and Fair Value by Major Security Type (Details) - USD ($) $ in Thousands	Sep. 25, 2021	Dec. 26, 2020
Marketable Securities [Line Items]
Gross Unrealized Losses Less than 12 Consecutive Months	$ (6,633)	$ (3,863)
Fair Value Less than 12 Consecutive Months	590,765	357,878
Gross Unrealized Losses 12 Consecutive Months or Longer	(2,130)	(976)
Fair Value 12 Consecutive Months or Longer	97,912	14,173
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	(8,763)	(4,839)
Fair Value, Total	688,677	372,051
Agency securities [Member]
Marketable Securities [Line Items]
Gross Unrealized Losses Less than 12 Consecutive Months	(43)
Fair Value Less than 12 Consecutive Months	6,957
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	(43)
Fair Value, Total	6,957
Mortgage-backed securities [Member]
Marketable Securities [Line Items]
Gross Unrealized Losses Less than 12 Consecutive Months	(103)	(1,849)
Fair Value Less than 12 Consecutive Months	14,116	85,688
Gross Unrealized Losses 12 Consecutive Months or Longer	(522)	(74)
Fair Value 12 Consecutive Months or Longer	8,289	2,122
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	(625)	(1,923)
Fair Value, Total	22,405	87,810
Corporate securities [Member]
Marketable Securities [Line Items]
Gross Unrealized Losses Less than 12 Consecutive Months	(4,400)	(1,065)
Fair Value Less than 12 Consecutive Months	377,924	199,187
Gross Unrealized Losses 12 Consecutive Months or Longer	(1,206)	(572)
Fair Value 12 Consecutive Months or Longer	66,783	8,625
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	(5,606)	(1,637)
Fair Value, Total	444,707	207,812
Municipal securities [Member]
Marketable Securities [Line Items]
Gross Unrealized Losses Less than 12 Consecutive Months	(1,746)	(223)
Fair Value Less than 12 Consecutive Months	176,509	50,403
Gross Unrealized Losses 12 Consecutive Months or Longer	(99)
Fair Value 12 Consecutive Months or Longer	15,287
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	(1,845)	(223)
Fair Value, Total	191,796	50,403
Other [Member]
Marketable Securities [Line Items]
Gross Unrealized Losses Less than 12 Consecutive Months	(341)	(726)
Fair Value Less than 12 Consecutive Months	15,259	22,600
Gross Unrealized Losses 12 Consecutive Months or Longer	(303)	(330)
Fair Value 12 Consecutive Months or Longer	7,553	3,426
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	(644)	(1,056)
Fair Value, Total	$ 22,812	$ 26,026

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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