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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid-In Capital [Member] | Treasury Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance at beginning at Dec. 27, 2014 | $ 1,797,435 | $ 73,521 | $ (330,132) | $ 1,859,972 | $ 2,571 | $ 3,403,367
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income |  |  |  | 456,227 |  | 456,227
Translation adjustment |  |  |  |  | (34,981) | (34,981)
Adjustment related to unrealized gains (losses) on available-for-sale securities net of income tax effects |  |  |  |  | 1,982 | 1,982
Comprehensive income |  |  |  |  |  | 423,228
Dividends declared |  | (100) |  | (385,682) |  | (385,782)
Tax benefit from issuance of equity awards |  | (2,050) |  |  |  | (2,050)
Issuance of treasury stock related to equity awards |  | (35,422) | 52,494 |  |  | 17,072
Stock compensation |  | 26,290 |  |  |  | 26,290
Purchase of treasury stock related to equity awards |  |  | (5,586) |  |  | (5,586)
Purchase of treasury stock under share repurchase plan |  |  | (131,413) |  |  | (131,413)
Balance at end at Dec. 26, 2015 | 1,797,435 | 62,239 | (414,637) | 1,930,517 | (30,428) | 3,345,126
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income |  |  |  | 510,814 |  | 510,814
Translation adjustment |  |  |  |  | 4,696 | 4,696
Adjustment related to unrealized gains (losses) on available-for-sale securities net of income tax effects |  |  |  |  | (11,029) | (11,029)
Comprehensive income |  |  |  |  |  | 504,481
Dividends declared |  |  |  | (384,629) |  | (384,629)
Tax benefit from issuance of equity awards |  | (6,309) |  |  |  | (6,309)
Issuance of treasury stock related to equity awards |  | (40,589) | 59,237 |  |  | 18,648
Stock compensation |  | 41,250 |  |  |  | 41,250
Purchase of treasury stock related to equity awards |  |  | (7,331) |  |  | (7,331)
Purchase of treasury stock under share repurchase plan |  |  | (93,233) |  |  | (93,233)
Reduction in par value of Common Stock | (1,779,456) | 1,779,456 |  |  |  |
Balance at end at Dec. 31, 2016 | 17,979 | 1,836,047 | (455,964) | 2,056,702 | (36,761) | 3,418,003
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income |  |  |  | 694,955 |  | 694,955
Translation adjustment |  |  |  |  | 88,320 | 88,320
Adjustment related to unrealized gains (losses) on available-for-sale securities net of income tax effects |  |  |  |  | 4,486 | 4,486
Comprehensive income |  |  |  |  |  | 787,761
Dividends declared |  |  |  | (382,783) |  | (382,783)
Issuance of treasury stock related to equity awards |  | (52,581) | 74,442 |  |  | 21,861
Stock compensation |  | 44,735 |  |  |  | 44,735
Purchase of treasury stock related to equity awards |  | 185 | (12,773) |  |  | (12,588)
Purchase of treasury stock under share repurchase plan |  |  | (74,523) |  |  | (74,523)
Balance at end at Dec. 30, 2017 | $ 17,979 | $ 1,828,386 | $ (468,818) | $ 2,368,874 | $ 56,045 | $ 3,802,466

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