Significant Accounting Policies - Additional Information (Detail) - USD ($)			12 Months Ended
	Sep. 18, 2020	Sep. 18, 2020	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	May 17, 2022
Significant Accounting Policies [Line Items]
Purchase price of separate operating segment					$ 699,361,000
Gain on Sale of Businesses				51,973,000
Allowance for doubtful accounts			6,700,000	8,100,000
Bad debt expense			300,000	700,000	3,400
Write off account receivable			1,600,000	1,200,000	300,000
Notes receivable, total			8,400,000
Notes receivable, current			$ 0
Notes receivable interest rate			3.50%
Notes receivable, maturity description			Remaining unpaid amounts, plus accrued interest, mature in fiscal 2025
Depreciable assets			$ 122,400,000	120,700,000	109,500,000
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			$ 4,400,000	4,500,000	2,500,000
Impairment Losses					$ 224,267,000
Amortization expense, expected, for fiscal year 2026			4,400,000
Amortization expense, expected, for fiscal year 2027			$ 4,300,000
Number of additional shares authorized to be repurchased						7,500,000
Repurchase of shares			3,982,657		3,574,109
Shares repurchased average price			$ 148.08		$ 87.82
Stock repurchase remaining number of shares authorized to be repurchased						10,822,992
Freight expense			$ 1,341,908,000	1,214,287,000	$ 1,061,367,000
Accumulated other comprehensive loss			3,175,000	3,440,000
Net of income taxes for accumulated other comprehensive loss			1,000,000.0
Maintenance and repair expenses			$ 147,800,000	$ 137,200,000	$ 127,000,000.0
Stock options excluded from computation of diluted earnings per share			6,053	569,431	475,082
Stock options, average exercise price per share			$ 139.80	$ 89.11	$ 95.46
Freight [Member]
Significant Accounting Policies [Line Items]
Freight expense			$ 199,100,000	$ 177,500,000	$ 168,100,000
Minimum [Member]
Significant Accounting Policies [Line Items]
Long-term supply agreements maturity year			2023
Revenue from contract with customer collection terms			30 days
Maximum [Member]
Significant Accounting Policies [Line Items]
Long-term supply agreements maturity year			2025
Revenue from contract with customer collection terms			75 days
Oil and Gas Proppants [Member]
Significant Accounting Policies [Line Items]
Purchase price of separate operating segment		$ 2,000,000.0
Impairment Losses					$ 224,300,000
Discontinued Operations, Disposed of by Sale | Oil and Gas Proppants [Member]
Significant Accounting Policies [Line Items]
Gain on Sale of Businesses	$ 9,200,000