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Marketable Securities - Schedule of Gross Unrealized Losses and Fair Value by Major Security Type (Details) - USD ($) $ in Thousands | Mar. 26, 2022 | Dec. 25, 2021
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Marketable Securities [Line Items] |  |
Gross Unrealized Losses Less than 12 Consecutive Months | $ (49,876) | $ (14,438)
Fair Value Less than 12 Consecutive Months | 979,951 | 768,737
Gross Unrealized Losses 12 Consecutive Months or Longer | (22,558) | (4,116)
Fair Value 12 Consecutive Months or Longer | 275,030 | 129,241
Gross Unrealized Losses, Total | (72,434) | (18,554)
Fair Value, Total | 1,254,981 | 897,978
Agency securities [Member] |  |
Marketable Securities [Line Items] |  |
Gross Unrealized Losses Less than 12 Consecutive Months | (487) | (110)
Fair Value Less than 12 Consecutive Months | 6,513 | 6,890
Gross Unrealized Losses 12 Consecutive Months or Longer | 0 | 0
Fair Value 12 Consecutive Months or Longer | 0 | 0
Gross Unrealized Losses, Total | (487) | (110)
Fair Value, Total | 6,513 | 6,890
Mortgage-backed securities [Member] |  |
Marketable Securities [Line Items] |  |
Gross Unrealized Losses Less than 12 Consecutive Months | (1,757) | (148)
Fair Value Less than 12 Consecutive Months | 52,201 | 18,909
Gross Unrealized Losses 12 Consecutive Months or Longer | (507) | (732)
Fair Value 12 Consecutive Months or Longer | 7,476 | 7,598
Gross Unrealized Losses, Total | (2,264) | (880)
Fair Value, Total | 59,677 | 26,507
Corporate securities [Member] |  |
Marketable Securities [Line Items] |  |
Gross Unrealized Losses Less than 12 Consecutive Months | (32,386) | (9,466)
Fair Value Less than 12 Consecutive Months | 669,654 | 499,084
Gross Unrealized Losses 12 Consecutive Months or Longer | (15,331) | (2,361)
Fair Value 12 Consecutive Months or Longer | 192,402 | 85,033
Gross Unrealized Losses, Total | (47,717) | (11,827)
Fair Value, Total | 862,056 | 584,117
Municipal securities [Member] |  |
Marketable Securities [Line Items] |  |
Gross Unrealized Losses Less than 12 Consecutive Months | (13,953) | (4,247)
Fair Value Less than 12 Consecutive Months | 231,353 | 226,009
Gross Unrealized Losses 12 Consecutive Months or Longer | (5,778) | (617)
Fair Value 12 Consecutive Months or Longer | 68,672 | 29,405
Gross Unrealized Losses, Total | (19,731) | (4,864)
Fair Value, Total | 300,025 | 255,414
Other [Member] |  |
Marketable Securities [Line Items] |  |
Gross Unrealized Losses Less than 12 Consecutive Months | (1,293) | (467)
Fair Value Less than 12 Consecutive Months | 20,230 | 17,845
Gross Unrealized Losses 12 Consecutive Months or Longer | (942) | (406)
Fair Value 12 Consecutive Months or Longer | 6,480 | 7,205
Gross Unrealized Losses, Total | (2,235) | (873)
Fair Value, Total | $ 26,710 | $ 25,050

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