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Income Taxes - Reconciliation of Income Taxes at Statutory Rate (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
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Dec. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Income Tax Disclosure [Abstract] |  |  |  |  |  |
United States statutory income tax expense |  |  |  | $ 38,264,000 | $ 75,196,000 | $ 74,444,000
Impact of Tax Act |  | $ 4,106,000 | $ 77,347,000 | (13,483,000) | 83,400,000 | 0
State income taxes, net of federal effect |  |  |  | 3,285,000 | 3,146,000 | 3,677,000
Nondeductible expenses, domestic manufacturing deduction (fiscal 2018 and 2017) and other |  |  |  | 2,677,000 | 1,078,000 | 1,993,000
Legal proceedings charge - European Competition Investigations - See Note 18 |  |  |  | 2,405,000 | 0 | 7,873,000
Net effect of GILTI, FDII, BEAT |  |  |  | 2,320,000 | 0 | 0
Goodwill impairment - See Note 5 |  |  |  | 0 | 0 | 3,812,000
Effect of foreign operations |  |  |  | (16,763,000) | (35,048,000) | (39,377,000)
Valuation allowance |  |  |  | 2,879,000 | (9,279,000) | 2,050,000
Income tax expense | $ 13,483 |  |  | $ 21,584,000 | $ 118,493,000 | $ 54,472,000

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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