Significant Accounting Policies - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Apr. 28, 2023	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022	May 17, 2022
Significant Accounting Policies [Line Items]
Allowance for doubtful accounts		$ 6,700	$ 6,900
Bad debt expense		300	300	$ 300
Write-offs of accounts receivable		600	100	1,600
Notes receivable, total			8,500
Notes receivable, current			1,100
Proceeds from collection of notes receivable	$ 8,500
Depreciable assets		$ 139,500	129,600	122,400
Basis of valuation		Property, Plant, and Equipment are stated at cost.
Depreciation Method		straight-line basis over the estimated useful lives
Goodwill impairment more likely than not a likelihood as greater percentage of fair value of reportable unit exceeds its carrying value		50.00%
Intangible Assets, Amortization Expense		$ 7,900	$ 6,800	$ 4,400
Amortization expense, expected, for fiscal year 2025		7,700
Amortization expense, expected, for fiscal year 2026		7,600
Amortization expense, expected, for fiscal year 2027		7,500
Amortization expense, expected, for fiscal year 2028		7,400
Amortization expense, expected, for fiscal year 2029		$ 7,100
Number of additional shares authorized to be repurchased					7,500,000
Repurchase of shares		1,863,534	3,075,788	3,982,657
Shares repurchased average price		$ 243.02	$ 126.05	$ 148.08
Stock repurchase remaining number of shares authorized to be repurchased		5,883,670
Freight expense		$ 1,573,976	$ 1,508,803	$ 1,341,908
Accumulated other comprehensive loss		3,373	3,547
Net of income taxes for accumulated other comprehensive loss		1,100
Maintenance and repair expenses		$ 220,100	$ 173,400	$ 147,800
Stock options excluded from computation of diluted earnings per share		16,609	52,375	6,053
Stock options, average exercise price per share		$ 133.91	$ 127.06	$ 139.8
Freight [Member]
Significant Accounting Policies [Line Items]
Freight expense		$ 215,300	$ 229,600	$ 199,100
Minimum [Member]
Significant Accounting Policies [Line Items]
Long term supply agreements term of termination notice period		2 years
Revenue from contract with customer collection terms		30 days
Maximum [Member]
Significant Accounting Policies [Line Items]
Long term supply agreements term of termination notice period		3 years
Revenue from contract with customer collection terms		75 days