Company Overview and Basis of Presentation - Initial Public Offering and Concurrent Private Placement - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 25, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Class Of Stock [Line Items]
Offering costs					$ 1,487	$ 0
Allocated share-based compensation expense			$ 98,812	$ 8,422	$ 116,104	$ 26,363
Restricted Stock Units
Class Of Stock [Line Items]
Number of shares released for awards where service and performance vesting conditions are met					5,158,846
Restricted Stock Units | Initial Public Offering
Class Of Stock [Line Items]
Number of shares released for awards where service and performance vesting conditions are met		2,574,499
Recognized payroll tax withholding obligation		$ 21,400
Allocated share-based compensation expense		$ 89,900
Initial Public Offering | Common Stock
Class Of Stock [Line Items]
Number of share, issued and sold	17,250,000
Shares issued, price per share	$ 12.00
Proceeds from issuance of common stock, net of underwriters' discounts and commissions	$ 192,500
Underwriting discounts and commissions	$ 14,500
Underwriters Option Included in IPO | Common Stock
Class Of Stock [Line Items]
Number of share, issued and sold	2,250,000
Private Placement | Common Stock
Class Of Stock [Line Items]
Number of share, issued and sold	3,333,333
Shares issued, price per share	$ 12.00
Proceeds from issuance of common stock, net of underwriters' discounts and commissions	$ 40,000
IPO and Private Placement | Common Stock
Class Of Stock [Line Items]
Proceeds from issuance of common stock, net of underwriters' discounts and commissions	225,300
Offering costs	$ 7,200