|
Marketable Securities (Classified as Available-For-Sale Securities) (Details) (USD $)
In Thousands, unless otherwise specified |
6 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
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Jun. 28, 2014
|
Dec. 28, 2013
|
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| Schedule of Available-for-sale Securities [Line Items] | ||||||||
| Amortized Cost | $ 1,636,240 | $ 1,700,619 | ||||||
| Gross Unrealized Gains | 7,628 | 13,082 | ||||||
| Gross Unrealized Losses-OTTI | (21,739) | [1] | (57,356) | [1] | ||||
| Gross Unrealized Losses-Other | (5,125) | [2] | (4,377) | [2] | ||||
| Estimated Fair Value (Net Carrying Amount) | 1,617,004 | 1,651,968 | ||||||
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Mortgage-Backed Securities [Member]
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| Schedule of Available-for-sale Securities [Line Items] | ||||||||
| Amortized Cost | 388,065 | 461,054 | ||||||
| Gross Unrealized Gains | 2,408 | 2,692 | ||||||
| Gross Unrealized Losses-OTTI | (5,392) | [1] | (22,614) | [1] | ||||
| Gross Unrealized Losses-Other | (4,870) | [2] | (3,802) | [2] | ||||
| Estimated Fair Value (Net Carrying Amount) | 380,211 | 437,330 | ||||||
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Obligations of States and Political Subdivisions [Member]
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| Schedule of Available-for-sale Securities [Line Items] | ||||||||
| Amortized Cost | 611,731 | 673,529 | ||||||
| Gross Unrealized Gains | 1,381 | 1,601 | ||||||
| Gross Unrealized Losses-OTTI | (12,244) | [1] | (27,509) | [1] | ||||
| Gross Unrealized Losses-Other | (45) | [2] | (267) | [2] | ||||
| Estimated Fair Value (Net Carrying Amount) | 600,823 | 647,354 | ||||||
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U.S. Corporate Bonds [Member]
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| Schedule of Available-for-sale Securities [Line Items] | ||||||||
| Amortized Cost | 521,141 | 463,437 | ||||||
| Gross Unrealized Gains | 976 | 1,050 | ||||||
| Gross Unrealized Losses-OTTI | (4,040) | [1] | (7,031) | [1] | ||||
| Gross Unrealized Losses-Other | (210) | [2] | (308) | [2] | ||||
| Estimated Fair Value (Net Carrying Amount) | 517,867 | 457,148 | ||||||
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Common Stocks [Member]
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| Schedule of Available-for-sale Securities [Line Items] | ||||||||
| Amortized Cost | 30,392 | 24,540 | ||||||
| Gross Unrealized Gains | 473 | 5,413 | ||||||
| Gross Unrealized Losses-OTTI | (15) | [1] | (99) | [1] | ||||
| Gross Unrealized Losses-Other | 0 | [2] | 0 | [2] | ||||
| Estimated Fair Value (Net Carrying Amount) | 30,850 | 29,854 | ||||||
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Other [Member]
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| Schedule of Available-for-sale Securities [Line Items] | ||||||||
| Amortized Cost | 84,911 | 78,059 | ||||||
| Gross Unrealized Gains | 2,390 | 2,326 | ||||||
| Gross Unrealized Losses-OTTI | (48) | [1] | (103) | [1] | ||||
| Gross Unrealized Losses-Other | 0 | [2] | 0 | [2] | ||||
| Estimated Fair Value (Net Carrying Amount) | $ 87,253 | $ 80,282 | ||||||
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