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Marketable Securities - Schedule of Marketable Securities Classified as Available-for-sale Securities (Details) - USD ($) $ in Thousands	Dec. 25, 2021	Dec. 26, 2020
Marketable Securities [Line Items]
Amortized Cost, Total	$ 1,623,253	$ 1,492,770
Gross Unrealized Gains	11,979	30,886
Gross Unrealized Losses	(18,554)	(4,839)
Fair Value	1,616,678	1,518,817
U.S. Treasury securities [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total		400
Gross Unrealized Gains		6
Gross Unrealized Losses
Fair Value		406
Agency securities [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	7,000	5,954
Gross Unrealized Gains		56
Gross Unrealized Losses	(110)
Fair Value	6,890	6,010
Mortgage-backed securities [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	149,692	239,445
Gross Unrealized Gains	257	1,051
Gross Unrealized Losses	(880)	(1,923)
Fair Value	149,069	238,573
Corporate securities [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	1,079,390	984,696
Gross Unrealized Gains	9,830	25,962
Gross Unrealized Losses	(11,827)	(1,637)
Fair Value	1,077,393	1,009,021
Municipal securities [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	356,037	214,515
Gross Unrealized Gains	1,870	3,644
Gross Unrealized Losses	(4,864)	(223)
Fair Value	353,043	217,936
Other [Member] | Fair Value, Level 2 [Member]
Marketable Securities [Line Items]
Amortized Cost, Total	31,134	47,760
Gross Unrealized Gains	22	167
Gross Unrealized Losses	(873)	(1,056)
Fair Value	$ 30,283	$ 46,871

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