Quarterly Operating Results (Unaudited) - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Severance, restructuring, and acquisition integration costs	$ 11,600	$ 11,700	$ 24,900	$ 20,400	$ 9,900	$ 16,700	$ 9,600	$ 6,600	$ 68,613	$ 42,790	$ 31,140
Overstatement Of Revenues
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Qualifying misstatement					27,800	11,800	10,400	6,100
Overstatement Of Net Income
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Qualifying misstatement					$ 5,200	$ 2,600	$ 1,300	$ 3,000