Income Taxes - Reconciliation of Income Taxes at Statutory Rate (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 30, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
United States statutory income tax expense			$ 30,857,000	$ 38,264,000	$ 75,196,000
Impact of Tax Act		$ 13,483,000	0	(13,483,000)	83,400,000
State income taxes, net of federal effect			2,764,000	3,285,000	3,146,000
Nondeductible expenses, domestic manufacturing deduction (fiscal 2018) and other			5,953,000	4,378,000	2,008,000
Legal proceedings charge - European Competition Investigations			0	2,405,000	0
Net effect of GILTI, FDII, BEAT			3,025,000	2,320,000	0
Goodwill impairment - See Note 7			10,714,000	0	0
Effect of foreign operations			(17,605,000)	(16,763,000)	(35,048,000)
Valuation allowance			4,349,000	2,879,000	(9,279,000)
Switzerland Tax Reform			(26,846,000)	0	0
Research and Development Credit			(3,390,000)	(1,701,000)	(930,000)
Income tax expense	$ 21,000		$ 9,821,000	$ 21,584,000	$ 118,493,000