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Consolidated Statements of Comprehensive Income (Loss) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2018
Dec. 29, 2017
Dec. 30, 2016
Statement of Comprehensive Income [Abstract]      
Net income (loss) $ 690,070 $ 154,227 $ (70,222)
Other comprehensive income (loss) [1] (354) 69 (184)
Comprehensive income (loss) $ 689,716 $ 154,296 $ (70,406)
[1] Other comprehensive income (loss) consisted solely of unrealized gains or losses, net, on available-for-sale securities arising during the periods presented. There were nominal or no reclassification adjustments to net income (loss) resulting from realized gains or losses on the sale of securities. During the year ended December 31, 2018, there was a tax benefit of $0.2 million related to other comprehensive income as a result of the release of our valuation allowance for our deferred tax assets; there was no income tax benefit or provision related to other comprehensive income (loss) during the remaining periods presented.