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Summary of Significant Accounting Policies (Details 5) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 30, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 31, 2016 | Sep. 24, 2016 | Jun. 25, 2016 | Mar. 26, 2016 | Dec. 30, 2017 | Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
Net sales |  | $ 888,496 | $ 743,077 | $ 816,885 | $ 638,546 | $ 860,767 | $ 722,250 | $ 811,609 | $ 624,040 | $ 3,087,004 | [1] | $ 3,018,665 | [1] | $ 2,820,270 | [1] |
Gross profit |  | 499,518 | 433,665 | 477,858 | 372,123 | 470,782 | 405,980 | 462,958 | 339,850 | 1,783,164 |  | 1,679,570 |  | 1,538,704 |  |
Operating income |  |  |  |  |  |  |  |  |  | 668,860 |  | 623,909 |  | 549,581 |  |
Income tax (benefit) provision |  |  |  |  |  |  |  |  |  | (12,661) |  | 118,856 |  | 110,960 |  |
Net income |  | $ 138,780 | $ 147,413 | $ 170,950 | $ 237,812 | $ 136,605 | $ 125,054 | $ 161,064 | $ 88,092 | $ 694,955 |  | $ 510,814 |  | $ 456,227 |  |
Diluted net income per share (in dollars per share) |  | $ 0.73 | $ 0.78 | $ 0.91 | $ 1.26 | $ 0.72 | $ 0.66 | $ 0.85 | $ 0.46 | $ 3.68 |  | $ 2.70 |  | $ 2.39 |  |
Current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred costs |  | $ 48,312 |  |  |  | $ 47,395 |  |  |  | $ 48,312 |  | $ 47,395 |  |  |  |
Total current assets |  | 2,363,925 |  |  |  | 2,263,016 |  |  |  | 2,363,925 |  | 2,263,016 |  |  |  |
Noncurrent deferred income tax |  | 199,343 |  |  |  | 110,293 |  |  |  | 199,343 |  | 110,293 |  |  |  |
Noncurrent deferred costs |  | 73,851 |  |  |  | 56,151 |  |  |  | 73,851 |  | 56,151 |  |  |  |
Total assets |  | 5,010,260 |  |  |  | 4,525,133 |  |  |  | 5,010,260 |  | 4,525,133 |  |  |  |
Current liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  | 139,681 |  |  |  | 146,564 |  |  |  | 139,681 |  | 146,564 |  |  |  |
Total current liabilities |  | 828,656 |  |  |  | 782,735 |  |  |  | 828,656 |  | 782,735 |  |  |  |
Deferred income taxes |  | 75,215 |  |  |  | 61,220 |  |  |  | 75,215 |  | 61,220 |  |  |  |
Non-current deferred revenue |  | 163,840 |  |  |  | 140,407 |  |  |  | 163,840 |  | 140,407 |  |  |  |
Retained earnings |  | 2,368,874 |  |  |  | 2,056,702 |  |  |  | 2,368,874 |  | 2,056,702 |  |  |  |
Accumulated other comprehensive income (loss) |  | 56,045 | $ (36,761) |  |  | (36,761) |  |  |  | 56,045 |  | (36,761) |  |  |  |
Total stockholders' equity |  | 3,802,466 |  |  |  | 3,418,003 |  |  |  | 3,802,466 |  | 3,418,003 |  | $ 3,345,126 |  | $ 3,403,367
Total liabilities and stockholders' equity |  | 5,010,260 |  |  |  | 4,525,133 |  |  |  | 5,010,260 |  | 4,525,133 |  |  |  |
Restated [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | [2] |  |  |  |  |  |  |  |  | 3,121,560 |  | 3,045,796 |  |  |  |
Gross profit | [2] |  |  |  |  |  |  |  |  | 1,797,941 |  | 1,688,525 |  |  |  |
Operating income | [2] |  |  |  |  |  |  |  |  | 683,637 |  | 632,864 |  |  |  |
Income tax (benefit) provision | [2] |  |  |  |  |  |  |  |  | (7,902) |  | 122,890 |  |  |  |
Net income | [2] |  |  |  |  |  |  |  |  | $ 704,973 |  | $ 515,735 |  |  |  |
Diluted net income per share (in dollars per share) | [2] |  |  |  |  |  |  |  |  | $ 3.74 |  | $ 2.72 |  |  |  |
Current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred costs | [2] | 30,525 |  |  |  | 34,665 |  |  |  | $ 30,525 |  | $ 34,665 |  |  |  |
Total current assets | [2] | 2,346,139 |  |  |  | 2,250,286 |  |  |  | 2,346,139 |  | 2,250,286 |  |  |  |
Noncurrent deferred income tax | [2] | 189,959 |  |  |  | 105,668 |  |  |  | 189,959 |  | 105,668 |  |  |  |
Noncurrent deferred costs | [2] | 33,029 |  |  |  | 30,934 |  |  |  | 33,029 |  | 30,934 |  |  |  |
Total assets | [2] | 4,942,268 |  |  |  | 4,482,560 |  |  |  | 4,942,268 |  | 4,482,560 |  |  |  |
Current liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue | [2] | 103,140 |  |  |  | 118,496 |  |  |  | 103,140 |  | 118,496 |  |  |  |
Total current liabilities | [2] | 792,115 |  |  |  | 754,667 |  |  |  | 792,115 |  | 754,667 |  |  |  |
Deferred income taxes | [2] | 76,612 |  |  |  | 62,617 |  |  |  | 76,612 |  | 62,617 |  |  |  |
Non-current deferred revenue | [2] | 87,061 |  |  |  | 91,238 |  |  |  | 87,061 |  | 91,238 |  |  |  |
Retained earnings | [2] | 2,412,423 |  |  |  | 2,090,233 |  |  |  | 2,412,423 |  | 2,090,233 |  |  |  |
Accumulated other comprehensive income (loss) | [2] | 56,428 |  |  |  | (37,024) |  |  |  | 56,428 |  | (37,024) |  |  |  |
Total stockholders' equity | [2] | 3,846,397 |  |  |  | 3,451,271 |  |  |  | 3,846,397 |  | 3,451,271 |  |  |  |
Total liabilities and stockholders' equity | [2] | 4,942,267 |  |  |  | 4,482,561 |  |  |  | 4,942,267 |  | 4,482,561 |  |  |  |
Impact [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 34,556 |  | 27,131 |  |  |  |
Gross profit |  |  |  |  |  |  |  |  |  | 14,777 |  | 8,955 |  |  |  |
Operating income |  |  |  |  |  |  |  |  |  | 14,777 |  | 8,955 |  |  |  |
Income tax (benefit) provision |  |  |  |  |  |  |  |  |  | 4,759 |  | 4,034 |  |  |  |
Net income |  |  |  |  |  |  |  |  |  | $ 10,018 |  | $ 4,921 |  |  |  |
Diluted net income per share (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.06 |  | $ 0.02 |  |  |  |
Current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred costs |  | (17,787) |  |  |  | (12,730) |  |  |  | $ (17,787) |  | $ (12,730) |  |  |  |
Total current assets |  | (17,786) |  |  |  | (12,731) |  |  |  | (17,786) |  | (12,731) |  |  |  |
Noncurrent deferred income tax |  | (9,384) |  |  |  | (4,625) |  |  |  | (9,384) |  | (4,625) |  |  |  |
Noncurrent deferred costs |  | (40,822) |  |  |  | (25,217) |  |  |  | (40,822) |  | (25,217) |  |  |  |
Total assets |  | (67,991) |  |  |  | (42,573) |  |  |  | (67,991) |  | (42,573) |  |  |  |
Current liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  | (36,542) |  |  |  | (28,068) |  |  |  | (36,542) |  | (28,068) |  |  |  |
Total current liabilities |  | (36,541) |  |  |  | (28,068) |  |  |  | (36,541) |  | (28,068) |  |  |  |
Deferred income taxes |  | 1,396 |  |  |  | 1,397 |  |  |  | 1,396 |  | 1,397 |  |  |  |
Non-current deferred revenue |  | (76,779) |  |  |  | (49,169) |  |  |  | (76,779) |  | (49,169) |  |  |  |
Retained earnings |  | 43,549 |  |  |  | 33,531 |  |  |  | 43,549 |  | 33,531 |  |  |  |
Accumulated other comprehensive income (loss) |  | 382 |  |  |  | (263) |  |  |  | 382 |  | (263) |  |  |  |
Total stockholders' equity |  | 43,931 |  |  |  | 33,268 |  |  |  | 43,931 |  | 33,268 |  |  |  |
Total liabilities and stockholders' equity |  | $ (67,992) |  |  |  | $ (42,572) |  |  |  | $ (67,992) |  | $ (42,572) |  |  |  |
[1] | The U.S. is the only country which constitutes greater than 10% of net sales to external customers.
[2] | Effective for the fiscal year ending December 29, 2018, we have adopted ASC Topic 606. The balances above are restated under ASC Topic 606.

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